Evolution Ch. 15-17
British land snails are an example of disruptive selection. In the grassy fields, the light-banded snails escape bird predators. In the darker forest, the dark snails survive and the light-banded snails are eaten. As long as the snails continue to cruise across the British landscape mating at the same season, why doesn't this "disruptive selection" eventually lead to two separate species? A. There is no reproductive isolation to prevent gene flow. B. They are already two separate species, and the intermediate forms are hybrids. C. The color forms are probably not genetically determined. D. There must be some unknown factor producing an equal stabilizing selection "to hold the species together." E. This will result in the formation of two species if given long enough time.
A. There is no reproductive isolation to prevent gene flow.
Several species of Caribbean Anoline lizards have evolved from a single ancestral species. The species occupy a wide variety of ecological niches, such as tree trunks and the ground, or tree trunks only, or tree trunks and the crown of trees, etc. This type of allopatric speciation is called A. adaptive radiation. B. alloploidy. C. autoploidy. D. hybridization.
A. adaptive radiation.
Occasionally, "living fossils" such as the coelacanth are found. These organisms appear to be little changed from their ancestors preserved in rock strata many millions of years ago. Such organisms often occur in ocean depths and in soil and desert environments that change less often over time. This is an indication that A. although gene mutations may be common, there may be little selection among individuals already well adapted to a uniform, stable environment. B. these organisms do not have the same high mutation rate of most organisms. C. by chance, these organism's mutations are all in alleles that do not affect morphology. D. the Hardy-Weinberg equilibrium prevents these organisms from evolving very fast. E. there is extensive inbreeding in such organisms.
A. although gene mutations may be common, there may be little selection among individuals already well adapted to a uniform, stable environment.
If two adjacent populations of the same species show gene flow, then the two populations will A. become more similar in their gene pools. B. become isolated from each other. C. develop into different species. D. adapt to different conditions and become separate.
A. become more similar in their gene pools.
Male fireflies are recognized by females of their species by the pattern of their flashings, while male crickets are recognized by females of their species by their chirping. These are examples of ____. A. behavioral isolation B. habitat isolation C. temporal isolation D. mechanical isolation
A. behavioral isolation
Hutton's theory of geological change included all EXCEPT A. catastrophic extinction of species. B. slow cycles of erosion and uplift. C. production of layers of sediment through slow deposition. D. extreme geological change occurring over a long period of time.
A. catastrophic extinction of species.
Homologous structures such as the bones in wings, flippers, and arms would be studied in the field of A. comparative anatomy. B. biogeography. C. the fossil record. D. comparative embryology. E. comparative biochemistry.
A. comparative anatomy.
Darwin's theory of natural selection to explain evolution is also known as A. descent with modification. B. inheritance of acquired characteristics. C. uniformitarianism. D. catastrophism.
A. descent with modification.
Adaptive radiation occurs when organisms A. exploit a variety of new environments. B. remain in the same, stable environment. C. undergo autoploidy and alloploidy. D. occupy the same habitat as their ancestral species.
A. exploit a variety of new environments.
A random alteration in the sequence of DNA nucleotides that provides a new variant allele is A. gene mutation. B. polymorphism. C. gene frequency. D. disruption.
A. gene mutation.
The recessive allele for sickle cell anemia is more prevalent in regions of Africa where malaria is prevalent, than it is in regions where there is no malaria. This is due to a: A. heterozygous advantage B. Founder Effect C. frequency dependent selection D. bottleneck effect
A. heterozygous advantage
A cross between a male horse and a female donkey produces a mule. Mules are an example of A. hybrid infertility. B. temporal isolation. C. gametic isolation. D. zygote mortality.
A. hybrid infertility.
If diagnostic traits are the same, fossils are considered to be A. members of the same species. B. distantly related. C. related, but not in the same family. D. unrelated, but showing signs of convergent evolution.
A. members of the same species.
Isolating mechanisms that prevent reproductive attempts or make it unlikely that reproductive attempts will be successful are referred to as A. prezygotic reproductive isolating mechanisms. B. a lack of F2 fitness. C. postzygotic isolating mechanisms. D. A and B are correct. E. None of the above.
A. prezygotic reproductive isolating mechanisms.
Reinforcement would eventually A. reduce the formation of hybrids. B. favor and therefore increase the formation of hybrids. C. have no effect on hybrid formation. D. increase the fitness of hybrids.
A. reduce the formation of hybrids.
The biological species concept relies mainly on ___________ to define a species. A. reproductive isolation B. morphological differences C. the presence of analogous traits D. comparative biochemical analysis
A. reproductive isolation
When previous adaptations in a species are no longer useful in a changed environment, A. selection of a different form occurs. B. artificial selection is witnessed. C. fitness is observed. D. All of the choices are correct.
A. selection of a different form occurs.
Which of these conditions is NOT among the requirements of the Hardy-Weinberg equilibrium of allele frequencies in a population? A. small population with genetic drift B. no net migration of alleles into or out of the population C. no net mutations D. no selection of one genotype over another E. random mating population
A. small population with genetic drift
Lamarck's theory of evolution included the idea that A. there is a natural force in all living things that pushes them toward perfection. B. local catastrophes cause mass extinctions of species. C. species are only produced through special creation. D. species are fixed and unchanging over time.
A. there is a natural force in all living things that pushes them toward perfection.
Which figure depicts a punctuated equilibrium model of evolution? A. Figure A B. Figure B
B. Figure B
Which of the following is true about genetic drift? A. It is more likely to occur in a large population than in a small population. B. It may lead to an allele's becoming fixed in a population when its alternative allele is lost from the population. C. It increases the number of heterozygotes in a population. D. It increases the frequency of rare alleles in a population.
B. It may lead to an allele's becoming fixed in a population when its alternative allele is lost from the population.
Cutting off the tails of mice over several generations should cause the tails of their offspring to become shorter, according to the ideas of which of these scientists? A. Darwin B. Lamarck C. Cuvier D. Lyell
B. Lamarck
In his theory of natural selection, Darwin incorporated the premise that available resources were not sufficient for all members of a population to survive. Darwin adopted these ideas of competition and survival from A. Erasmus Darwin. B. Malthus. C. Cuvier. D. Lamarck. E. Plato.
B. Malthus.
Lamarck's ideas on evolution were adopted by some Russian scientists, including Michurin and Lysenko in Stalinist Russia. Their textbooks printed Lysenko's assertions that a wheat plant could be made cold-hardy by conditioning in cold storage, or that workmen who develop strong muscles would produce children who were stronger. Which of the major premises of evolution by natural selection was violated? A. The organisms vary in traits. B. Natural selection acts on variations that are already available in the population's gene pool. C. More young are born than can survive. There will always be more demand than resources available. D. Some individuals are better adapted to the environment.
B. Natural selection acts on variations that are already available in the population's gene pool.
Which of the following would change the allele frequencies of a population? A. DNA is stable from generation to generation and does not change, so allele frequencies do not change. B. Tall people in a population preferentially marry other tall people and do not marry people who are short or average height. C. A population on an island remains isolated and no one leaves or moves onto the island. D. All of the above would change allele frequencies of a population.
B. Tall people in a population preferentially marry other tall people and do not marry people who are short or average height.
Another student proposes that handedness could just as easily be passed to children by how the parents carry the child and interact with it, a learning process that may perpetuate the parents' handedness. Assuming all parents and children are expressing their "true handedness," the occurrence of which case below would cast the most serious doubt on a simple genetic basis for handedness, with left-handedness recessive? A. Two right-handed parents have a left-handed child. B. Two left-handed parents have a right-handed child. C. Left-handed parents only have left-handed children. D. Right-handed parents only have right-handed children. E. None of the choices is correct.
B. Two left-handed parents have a right-handed child.
Natural selection was independently proposed as a means of evolution by Darwin and A. Lyell. B. Wallace. C. LeClerc. D. Lamarck.
B. Wallace.
Female Anolis distinguish males of their species by the color of their dewlap, a colorful flap of skin in the neck region. This is an example of A. a postzygotic isolating mechanism. B. a prezygotic isolating mechanism. C. temporal isolation. D. hybrid inviability.
B. a prezygotic isolating mechanism.
Members of the ancestral salamander species live in northern California. As they migrate southward, populations are separated by the Central Valley. With limited contact between populations on the east and west of the valley, genetic differences accumulate. What type of speciation occurs under these conditions? A. sympatric speciation B. allopatric speciation C. both sympatric and allopatric speciation D. neither sympatric or allopatric
B. allopatric speciation
What type of speciation requires a geographic barrier? A. sympatric speciation B. allopatric speciation C. both sympatric and allopatric speciation require a geographic barrier D. neither sympatric or allopatric speciation require a geographic barriers
B. allopatric speciation
A major advantage of the evolutionary species concept is that it A. relies primarily on reproductive isolation to identify species. B. applies to both sexually and asexually reproducing species. C. uses morphological traits to distinguish species. D. is the same as the classic biological species concept.
B. applies to both sexually and asexually reproducing species.
Erasmus Darwin, in his discussion of evolutionary possibilities, included all of the following EXCEPT A. changes during the development of organisms. B. comparative anatomy of plants and algae. C. vestigial organs. D. artificial selection in animal breeding.
B. comparative anatomy of plants and algae.
Perissodus are small, scale-eating fish that live in Lake Tanganyika in Africa. They attack larger fish from behind. The right-mouthed Perissodus attack on the left side of the larger fish and the left-mouthed Perissodus attack on the right side of the larger fish. The existence of the right-mouthed variety ensures the equally successful existence of the left-mouthed variety. This is an example of: A. a heterozygous advantage B. frequency dependent selection C. genetic drift D. sexual selection
B. frequency dependent selection
In which model of evolution are many transitional forms predicted? A. punctuated equilibrium B. gradualistic C. Neither A or B. D. Both A and B.
B. gradualistic
Two species of the garter snake in the genus Thamnophis are found in the same geographic region. These species are not likely to meet and attempt to reproduce because one lives mainly in the water, while the other species spends most of its time on land. This is known as A. behavioral isolation. B. habitat isolation. C. temporal isolation. D. zygote mortality.
B. habitat isolation.
Reinforcement is more likely to occur when A. hybrids are more fit than members of the parent species. B. hybrids are less fit than members of the parent species. C. there are no differences between the fitness of the parent species and hybrids. D. None of the above are true.
B. hybrids are less fit than members of the parent species.
In a population, the allele frequency for red flower color remained at 0.7 and the allele frequency for white flower remained at 0.3 for six generations. This ____ an example of a Hardy Weinberg equilibrium in that __________. A. is not, evolution occurred B. is, evolution did not occur C. is, evolution occurred D. is not, evolution did not occur
B. is, evolution did not occur
Evolutionary change above the species level is referred to as _________, whereas evolutionary changes below the species level is known as ____________. A. convergent; divergent B. macroevolution; microevolution C. microevolution; macroevolution D. punctuated; gradualistic
B. macroevolution; microevolution
The most common source of genetic variation in sexually reproducing organisms is A. mutation. B. recombination of alleles through meiosis and fertilization. C. duplication of chromosomes. D. duplication of genes.
B. recombination of alleles through meiosis and fertilization.
In speciation which of the following is mismatched? A. allopatric speciation-geographic isolation B. sympatric speciation-geographic isolation C. adaptive radiation-chance for new species to adapt to new habitats D. post-zygotic isolation-hybrid offspring sterility
B. sympatric speciation-geographic isolation
An idea that could be traced back to Plato is that A. hybrids showed that species could be changed with time. B. variation is due to imperfections in copies of some perfect ideal form. C. artificial selection of animals by humans proves that evolution can occur. D. acquired characteristics could be passed from parents to offspring. E. worldwide catastrophes caused extinction, followed by creation of new species.
B. variation is due to imperfections in copies of some perfect ideal form.
A student proposes that left-handedness is a recessive trait that is therefore hidden in much of the human population. A survey of a class of 36 students finds that 27 (0.75) are right-handed and 9 (0.25) are left-handed. Using the Hardy-Weinberg formula, what would the expected genotypes and allele frequencies be in this theoretical population? A. 0.75 homozygous dominant and 0.25 homozygous recessive, and a 3-to-1, right-to-left handed allele ratio in the population. B. 0.25 homozygous dominant, 0.50 heterozygous, and 0.25 homozygous recessive, and a 0.75 dominant allele frequency and a 0.25 recessive allele frequency. C. 0.25 homozygous dominant, 0.50 heterozygous, and 0.25 homozygous recessive, and a 0.5 allele frequency for each allele D. 0.50 homozygous dominant, 0.25 heterozygous, and 0.25 homozygous recessive, and a 0.5 allele frequency for each allele E. They cannot be estimated using these limited data.
C. 0.25 homozygous dominant, 0.50 heterozygous, and 0.25 homozygous recessive, and a 0.5 allele frequency for each allele
Plant species A has a diploid number of 28 chromosomes, while Plant species B has a diploid number of 14 chromosomes. Species A and B produce a hybrid through alloploidy. The diploid number of chromosomes of the hybrid is A. 28. B. 14. C. 42. D. 21.
C. 42.
Which of the following is/are true about natural selection? A. It acts on genotypes rather than phenotypes. B. It assures the survival of each fit individual. C. On average, it favors the survival of more young with adaptive characteristics. D. It always selects for more complex forms. E. All of the choices are correct.
C. On average, it favors the survival of more young with adaptive characteristics.
________ prevent hybrid offspring from developing or if the hybrid is born, it is infertile. A. Prezygotic reproductive isolating mechanisms B. Temporal isolation mechanisms C. Postzygotic isolating mechanisms D. A and B are correct. E. None of the above.
C. Postzygotic isolating mechanisms
Descriptions of new species of insects are more likely to contain diagrams of the shape of the male genitalia than head, wing, or leg parts. Why? A. This is where mutations usually express themselves in animals. B. Radiation damage to genes usually occurs in genitalia. C. Small changes in the genitalia cause reproductive isolation while a single species can tolerate wider variation in head, wing, and leg morphology. D. Arthropods have hard exoskeletons so head, wing, and leg structures can't vary as much. E. This is the convention or custom of entomology.
C. Small changes in the genitalia cause reproductive isolation while a single species can tolerate wider variation in head, wing, and leg morphology.
Most of Darwin's observations about changes in species over time and in different environments took place in and near A. North America. B. Africa. C. South America. D. Asia. E. Greenland
C. South America.
What is the scala naturae? A. a species of horse B. the first theory of evolution C. a sequential ladder of life, with humans at the top D. another name for the theory of special creation
C. a sequential ladder of life, with humans at the top
Over many generations man has chosen certain desirable characteristics in dogs by allowing dogs possessing those characteristics to reproduce. In this way, 150 breeds of dogs, all in the same species, have descended from wolves. This process is referred to as A. natural selection. B. inheritance of acquired traits. C. artificial selection. D. convergent evolution.
C. artificial selection.
Mutations that result in resistance to specific antibiotics in bacterial organisms occur: A. only when the bacteria are exposed to the drug to which they become resistant. B. more often when the bacteria are exposed to the drug. C. at any time, even when the bacteria are not exposed to the drug. D. only when the bacteria are exposed to radiation or other mutagens.
C. at any time, even when the bacteria are not exposed to the drug.
The evolutionary species concept involves the identification of certain structural traits, called ______, to distinguish one species from another. A. analogous traits B. homologous traits C. diagnostic traits D. convergent traits
C. diagnostic traits
A certain species of butterfly varies in color from white to dark blue. The birds found in the same area feed on the white or lightly colored butterflies, leaving butterflies that are darkly colored. This may result in what type of selection? A. stabilizing selection B. disruptive selection C. directional selection
C. directional selection
Some genes can bring about radical changes in body shape and organs. The Pax6 gene is one such gene and is involved in A. determining the location of repeated structures in all vertebrates. B. the development of limbs. C. eye formation in all animals. D. breast cancer.
C. eye formation in all animals.
Darwin's opinion that living forms must be descended from extinct forms was based on ________ evidence. A. anatomical B. biochemical C. fossil D. biogeographical
C. fossil
In some plants, the sperm can not reach the egg because the stigma prevents formation of the pollen tubes. This is an example of A. temporal isolation. B. behavioral isolation. C. gametic isolation. D. mechanical isolation.
C. gametic isolation.
Social research indicates that a person is most likely to marry someone from the same village or city, or a high school or college classmate. Therefore, the Hardy-Weinberg equilibrium does not apply well to human populations because A. allelic changes in one direction are balanced by changes in the opposite direction. B. there is no directional trend in selection of mates since most individuals marry someone. C. individuals are not pairing up by chance across the whole population D. this increases gene flow. E. we accumulate adaptive traits that improve the population.
C. individuals are not pairing up by chance across the whole population
What is the term used to describe the changes in allele frequencies of a population over generations? A. genetic drift B. founder effect C. microevolution D. directional selection
C. microevolution
Sympatric speciation in plants, as a result of _______, is well documented. A. any type of geographic barrier B. a series of islands off of a mainland C. polyploidy D. mountain ranges
C. polyploidy
All the members of a single species that occupy a particular area at the same time are known as a: A. subspecies. B. gene pool. C. population. D. group. E. sub-population.
C. population.
Which of the following ideas was most commonly held in the eighteenth century? A. evolution by natural selection over time B. genetic change through mutation C. the fixity of species D. changes in a species through adaptation to the environment
C. the fixity of species
Birds and insects both have wings, but we do not consider this similarity as evidence of relatedness because A. bird wings function on different physics principles of lift. B. insect wings are vestigial. C. the wings are not homologous structures with a common ancestral origin. D. they did not evolve in the same region or live at the same time period. E. there is no fossil link between these groups.
C. the wings are not homologous structures with a common ancestral origin.
The organisms on the Galápagos Islands that were most important to the development of Darwin's theory of natural selection were A. rabbits and hares. B. plants and fungi. C. tortoises and finches. D. snails and fish. E. monkeys and armadillos.
C. tortoises and finches.
A major disadvantage of the evolutionary species concept is that it A. relies primarily on reproductive isolation to identify species. B. applies to both sexually and asexually reproducing species. C. uses morphological traits to distinguish species. D. is the same as the classic biological species concept.
C. uses morphological traits to distinguish species.
A _____ is the first cell that results when an egg is fertilized by a sperm. A. spermatogonium B. gastrula C. zygote D. blastula
C. zygote
Norway rats (Rattus norvegicus) and roof rats (Rattus rattus) are different species. Occasionally, mating occurs if the two species are kept together in captivity. The resulting pregnancies are not successful and the embryos die. This is an example of A. mechanical isolation. B. hybrid sterility. C. zygote mortality. D. lack of F2 fitness.
C. zygote mortality.
When a diploid plant produces diploid gametes due to nondisjunction during meiosis, what occurs? A. Autoploidy is occurring. B. An increase in the number of chromosomes above the parent species occurs. C. A triploid or tetraploid plant may occur. D. All of the above are true.
D. All of the above are true.
The biological species concept is limited, and may not be applied to A. asexually reproducing organisms. B. organisms known only in the fossil record. C. species that could possibly interbreed if they lived near one another. D. All of the above. E. A and C only.
D. All of the above.
Darwin observed that A. members of a population vary in their functional, physical and behavioral characteristics. B. there is a constant struggle for survival of organisms. C. organisms in a normal population differ in reproductive success. D. All of the choices are correct. E. A and B only are correct.
D. All of the choices are correct.
If the mutation rate of individual genes is taken to be about one in 100,000 genes per cell cycle across many organisms, we might expect evolution to proceed at a consistent rate for various forms of life. Which factor could make the accumulation of gene mutations faster or slower among different organisms? A. Organisms with more genes will likely have more mutations per generation. B. More selection of mutations can occur in a shorter period of time for bacteria that replicate each twenty minutes than for humans with a (roughly) 20-year generation span. C. Organisms vary in the proportion of DNA that is active and in the percent of loci that have multiple alleles. D. All of the choices are correct.
D. All of the choices are correct.
Reproductive isolation A. means there is no gene flow between two groups of organisms (species). B. is necessary for species to remain separate. C. is maintained by certain prezygotic and postzygotic barriers. D. All of the choices are correct. E. A and B only.
D. All of the choices are correct.
The post Darwinian view of the world included A. the age of the Earth is billions of years old. B. species are related by descent. C. an interaction of random variations and environmental conditions produced environmental adaptation. D. All of the choices are correct. E. B and C only are correct.
D. All of the choices are correct.
Variations within a population are maintained by A. mutation. B. genetic recombination due to fertilization. C. gene flow. D. All of the choices are correct.
D. All of the choices are correct.
While we have seen how natural selection and the use of pesticides can lead to the development of resistant varieties of insects, two economically important flies, the Mediterranean fruit fly (Medfly) and the screwworm fly, can be driven to local extinction by the continuous release of sterile flies of those species. The critical factor is that the female of these species only mates once. But which of the following is/are also necessary for sterile release to work? A. The target species is truly just one species. B. The insect can be raised artificially in large numbers. C. The insects to be released can be sterilized with radiation without affecting their ability to attract a mate in the wild. D. All of the choices are correct.
D. All of the choices are correct.
Two fossilized remains are found and scientists assume the two organisms are different but related. Which of the following would determine the relatedness of these two organisms? A. homologous structures B. vestigial structures C. biogeography D. All of the choices could be examined to determine relatedness.
D. All of the choices could be examined to determine relatedness.
What do the Founder Effect and the Bottleneck Effect have in common? A. Both the Founder Effect and the bottleneck effect result from mutation B. Both the Founder Effect and the bottleneck effect result from increase gene flow C. Both the Founder Effect and the bottleneck effect are examples of disruptive selection D. Both the Founder Effect and the bottleneck effect occur by chance.
D. Both the Founder Effect and the bottleneck effect occur by chance.
The northern elephant seal was hunted almost to extinction during the 18th and 19th centuries. Less than 100 seals were left to contribute to the gene pool of their future generations. Since the early 20th century, the elephant seals have been protected by law in both the U.S. and Mexico. Over 100,000 seals now inhabit the western shores of North America, all related to the small population that survived the slaughter of hunters. Scientists fear the elephant seals may be more susceptible to disease and pollution due to a _____. A. a heterozygous advantage B. disruptive selection C. Founder Effect D. Bottleneck Effect
D. Bottleneck Effect
Which statement is NOT true about natural selection? A. Directional selection occurs when one extreme phenotype is favored over another different extreme phenotype. B. Stabilizing selection favors an intermediate phenotype over either of the extreme phenotypes. C. Disruptive selection favors both of the extreme phenotypes over the intermediate phenotype. D. Directional selection leads to improved selection in a stable environment. E. Disruptive selection leads to polymorphism, favoring different forms of the same species.
D. Directional selection leads to improved selection in a stable environment.
Our domesticated honey bee—originally from Europe—is slow to sting, requires abundant flower nectar, gets up late in the morning, and stores much honey but only produces enough new brood to swarm once a year. Because the European honey bee was performing poorly as a honey producer in South America, the African subspecies was imported in a breeding experiment. The African honey bee formed small nests, foraged earlier and on smaller nectar sources, produced less honey stores and more brood, swarmed four or five times a year, and was fast to sting. However, when the African queens escaped, the two populations interbred and the African genotype spread several hundred miles north each year. Surprisingly, a hundred miles behind the expanding range of the African honey bees, the European and hybrid strains died out and the bees were essentially 100 percent African. How would this be explained in evolutionary genetics terms? A. Gene flow is not occurring and therefore these are two separate species. B. This is a natural consequence of the Hardy-Weinberg equilibrium. C. Obviously the African bee genes are dominant over the European honey bee alleles. D. Gene flow is occurring between these subspecies but the African bee is 'ecologically better suited" E. This can be understood as a classic case of genetic drift.
D. Gene flow is occurring between these subspecies but the African bee is 'ecologically better suited"
Who was the author of the book Principles of Geology? The book presented arguments to support a theory of geological change, proposing that the earth was subject to slow but continuous erosion and uplift? A. Leclerc B. Lamarck C. Cuvier D. Lyell
D. Lyell
In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection? A. The organisms vary in traits and that these traits may be acquired during a lifetime. B. The variation is inherited. C. More young are born than can survive, so there will always be competition. D. Some individuals are better adapted to a particular environment than other individuals.
D. Some individuals are better adapted to a particular environment than other individuals.
______ is when one species splits into two species or when one species transforms into another over time. A. Reproductive isolation B. Convergent evolution C. The founder effect D. Speciation E. Both A and D are correct.
D. Speciation
Which statement is NOT true about the Founder Effect? A. It is a form of genetic drift. B. It produces a high frequency of some rare alleles in a small isolated population. C. Founding members contain a tiny fraction of the alleles found in the original population. D. The Founder Effect occurs when a population is subjected to near extinction and then recovers so that only a few alleles are left in survivors.
D. The Founder Effect occurs when a population is subjected to near extinction and then recovers so that only a few alleles are left in survivors.
Which of the following is NOT involved in natural selection? A. There is always competition for resources. B. Organisms differ in reproductive success. C. There are inheritable variations in populations. D. The desired traits are chosen by a breeder.
D. The desired traits are chosen by a breeder.
Linnaeus developed his classification system for organisms according to A. a theory of descent by modification. B. Darwin's theory of evolution. C. Lamarck's theory of evolution. D. a theory of special creation and fixity of species.
D. a theory of special creation and fixity of species.
Darwin's observation that there were Patagonian hares but no rabbits in South America would be considered ______________ evidence. A. anatomical B. biochemical C. fossil D. biogeographical
D. biogeographical
Fossils like Archaeopteryx offer evidence linking A. reptiles and mammals. B. fish and amphibians. C. birds and mammals. D. birds and reptiles. E. amphibians and reptiles.
D. birds and reptiles.
The theory of __________ proposed that a series of catastrophes or mass extinctions followed by repopulation could explain why species change over time. A. descent with modification B. inheritance of acquired traits C. uniformitarianism D. catastrophism
D. catastrophism
A line of evidence NOT considered by Darwin in his development of the theory of natural selection is A. comparative anatomy. B. biogeography. C. the fossil record. D. comparative biochemistry.
D. comparative biochemistry.
In ________, proteins on the surface of the sperm are not able to bind to proteins on the surface of the egg. A. temporal isolation B. behavioral isolation C. mechanical isolation D. gametic isolation
D. gametic isolation
A population must have ______ for natural selection to occur. A. a stable environment B. abundant resources C. many individuals D. inheritable variation
D. inheritable variation
Transitional forms are seen in the fossil record that links all of these groups EXCEPT A. birds and reptiles. B. reptiles and amphibians. C. fish and amphibians. D. mammals and birds. E. mammals and reptiles.
D. mammals and birds.
All of the following statements concerning the evolutionary species concept are true EXCEPT A. an abrupt change in the diagnostic traits of fossils is indicative of the evolution of a new species. B. fossils are considered to be members of the same species if they possess the same diagnostic traits. C. certain structural traits, called diagnostic traits, are used to distinguish one species from another. D. members of a species may actually have quite dissimilar evolutionary pathways.
D. members of a species may actually have quite dissimilar evolutionary pathways.
If the Hardy-Weinberg equilibrium is met, what is the net effect? A. evolution leading to a population better adapted to an unchanging environment B. evolution leading to a population better adapted to a changing environment C. very slow and continuous evolution with no increased adaptation D. no evolution because the alleles in the population remain the same
D. no evolution because the alleles in the population remain the same
Scientists developed the ____________ model after their studies of the fossil record revealed that some species appear quite suddenly and then remain essentially unchanged phenotypically for a long period of time. A. Hardy-Weinberg B. Urey-Miller C. gradualistic D. punctuated equilibrium
D. punctuated equilibrium
The process in which natural selection favors the continual development of prezygotic isolating mechanisms is called A. disruptive selection. B. sympatric speciation. C. mutation. D. reinforcement.
D. reinforcement.
All of the following are examples of natural selection EXCEPT A. the distribution of dark and light colored peppered moths in Britain. B. a rise in bacterial resistance to antibiotics. C. the reduction in beak length of scarlet honeycreepers when they changed food sources. D. the 150 breeds of dogs developed from ancestral wolves. E. B and D are not examples of natural selection.
D. the 150 breeds of dogs developed from ancestral wolves.
Darwin's geometric ratio of increase pertains specifically to A. the inheritable variations found in a population. B. the artificial selection of traits in plants or animals. C. the inheritance of acquired traits. D. the overproduction potential of a species.
D. the overproduction potential of a species.
An insect population lives along the edge of a north-south mountain range. The populations from the east and west slope eventually join in a low northern pass and interbreed, producing fertile offspring, but they do not circle around the southern edge because of a desert barrier. When glaciers move southward, the populations are pushed south of the northern pass and are isolated. While isolated, the two populations develop enough differences over time that when the glaciers retreat north and the insects again share the same pass, they no longer mate at the same time, nor can they produce fertile offspring. These insects A. began as one species and therefore remain one species. B. were originally two species and remain two species. C. were originally two species but are now one species. D. were originally one species but are now two species. E. The number of species cannot be determined from the information given.
D. were originally one species but are now two species.
Once members of a species are geographically isolated, what factors may cause them to differ from each other over time? A. natural selection B. genetic drift C. new mutations D. A and B only. E. All of the above are correct.
E. All of the above are correct.
What evidence would be studied by a biogeographer? A. plate tectonics B. amount of genetic similarity among current populations C. ocean currents and wind patterns D. ranges and migration patterns of animals E. All of the choices are correct.
E. All of the choices are correct.
When he arrived at the Galápagos Islands, Darwin did not observe the amazing tool-using "woodpecker finch" that can modify twigs to pry out grubs. Because there are no true woodpeckers on the Galápagos Islands, this behavior allows this finch to exploit an untapped food source. However, not all members of this species exhibit this behavior, which is probably learned from watching other finches. Therefore, A. young isolated at hatching will not know how to do this. B. it is probably not "hardwired" in the brain as a behavior passed on genetically. C. there must be a great advantage to reaching this food source for this learned behavior to be repeated by most descendants of each generation. D. as an acquired characteristic, in a strict sense this is not part of the adaptive radiation of finches on the Galápagos. E. All of the choices are correct.
E. All of the choices are correct.
Which of the following is/are a biological "population?" A. all of the corn plants in a cornfield B. all of the variable-colored ladybird beetles of the species Harmonia axyridis in a forest C. all male and female English sparrows that reside in your community D. all of the human population of a rural western town E. All of the choices are correct.
E. All of the choices are correct.
Which of the following reflect(s) the likely presence of (a) gene mutation(s)? A. Fruit flies subjected to intense radiation produce a wider array of variable offspring. B. A chemical leaking from the surface of an old abandoned coal mine alters a regulatory gene so that a cricket nymph develops an extra set of eyes. C. The bacteria that cause gonorrhea, a common sexually transmitted disease, have previously been killed by penicillin; however, after continuous usage of the antibiotic, penicillin-resistant strains are now becoming prevalent. D. Radiation causes an alteration in a DNA nucleotide sequence, which is discovered when mapped, but which appears to be neither increasing nor decreasing in successive generations. E. All of the choices are correct.
E. All of the choices are correct.
Which of the following would result in reproductive isolation? A. Two populations of crickets are indistinguishable in physical features, but the females in each group only come to the different songs of their males. B. Fruit flies on one Hawaiian island live for hundreds of generations and do not come in contact with fruit flies on another island except when blown there by rare tropical storms. C. One brood of the seventeen-year cicada emerged in 1987 (and will do so every 17 years) and lives a few months as adults; another brood emerged in 1992 (and will do so every 17 years); the larvae of both feed side-by-side on tree roots. D. A lion and a tiger mate in the artificial confines of a zoo but the offspring is infertile. E. All of the choices are correct.
E. All of the choices are correct.
Which of the following is required for natural selection to occur in a population? A. variation in the population B. inheritance of variation through genetic differences C. differential reproduction so that the more fit individuals have more offspring that survive to reproduce D. accumulation of adaptive traits so that they increase in the population E. All of the choices are required.
E. All of the choices are required.
Which naturalist wrote a 44-volume natural history on plants and animals, and suggested migration, environmental influences, isolation, and overcrowding might affect how organisms descend with modifications? A. Darwin B. Lamarck C. Cuvier D. Lyell E. Leclerc
E. Leclerc
The Greek root words meaning "together" and "fatherland" are the basis for the term A. prezygotic. B. adaptive radiation. C. speciation. D. allopatric. E. sympatric.
E. sympatric.
If early Viking explorers in Greenland and North America had survived and become the main ancestors of early North American settlers, rather than the mixture of immigrants from across Europe and other continents, today there would be a much higher incidence of Nordic traits in the U.S. population. Such a scenario would demonstrate A. gene flow from continent to continent. B. the bottleneck effect. C. genetic drift among the original Viking explorers. D. directional selection. E. the Founder Effect.
E. the Founder Effect.
"Evolution" is a Latin term that comes from the root word meaning A. species. B. new. C. anti-religious. D. fossils. E. unrolling.
E. unrolling.
