Exam 1, Chap. 06 Quiz

Fossils are typically deposited in stratified layers with new deposits forming on top of older ones so that characteristic fossils often serve to identify particular layers. Which of the following are considered to be good indicators of specific geological periods (that is, they are "index" or "guide" fossils)? - Foraminferans - Echinoderms - Bacteria - Archaea - A and B only

A and B only (Foraminferans and Echinoderms)

The production of ecologically diverse species from a common ancestral stock is called: - Adaptive radiation - Gamma radiation - Ecological diversification - The Galapagos effect - None of the above is correct

Adaptive radiation

Fossils may include which of the following? - Insects in amber - Hard parts such as teeth and bones - Feathers - Molds, casts, and impressions - All of the above are correct

All of the above are correct

Macroevolution, or evolution on a grand scale, encompasses the origins of new organismal structures and designs, but may also include which of the following: - Evolutionary trends - Adaptive radiation - Phylogenetic relationships of species - Mass extinctions - All of the above are correct

All of the above are correct

Which of the following is NOT correct? - Malthus: wrote essays on populations that stimulated thoughts of the "struggle for existence." - Natural selection: the vehicle of organic evolution proposed by Charles Darwin. - Alfred Wallace: proposed a theory of evolution similar to that of Darwin's. - Darwin: wrote "On the Origin of Species by Means of Natural Selection." - All of the above are correct

All of the above are correct

Which of the following is NOT correct? - Neo-Darwinism: Darwinism plus Mendelian genetics - Microevolution: evolutionary changes in frequencies of different allelic forms of genes within populations - Polymorphisms: the occurrence of different allelic forms of a gene in a population - Hardy-Weinberg Equilibrium: the foundation for population of genetics - All of the above are correct

All of the above are correct

Which of the following statements, if any, cannot be supported by evidence? - Organisms have great potential fertility - Natural populations normally remain constant in size, except for minor fluctuations - Natural resources are limited - A continuing struggle for existence exists among members of a population - All of the above are supported by evidence

All of the above are supported by evidence

Which of the following exhibit great fossil beds? - Precambrian fossil beds of South Australia - Tar pits of Rancho la Brea - Dinosaur Provincial Park in Canada - Olduvai Gorge in Tanzania - All of the above represent excellent fossil beds

All of the above represent excellent fossil beds

When two different extreme phenotypes are simultaneously favored, the population may exhibit two very different phenotypes. This type of quantitative selection is called? - Monomorphic selection - Stabilizing selection - Directional selection - Disruptive selection - None of the above is correct

Disruptive selection Stabilizing selection - extreme phenotypes are selected against, each other and individuals near the average are favored. Directional selection - occurs when an extreme phenotype is favored and the distribution curve shifts in that direction.

Charles Darwin realized that the plants and animals of the Galapagos were different and obviously NOT related to those of the South American mainland. True or False

False

In species with sexual reproduction, many individuals show no phenotypic variation whatsoever. True or False

False

Which of the following is mismatched? - Sir Charles Lyell/Principles of Geology - Principle of Uniformitarianism/Sir Charles Lyell - Charles Darwin/Voyage of the Beagle in 1831 - Galapagos Islands/Adaptive radiation of fruit flies - None of the above is mismatched

Galapagos Islands/Adaptive radiation of fruit flies

The chance fluctuation in allelic frequency from one generation to the next, including the loss of alleles from the population, is called? - Genetic drift - Nonrandom mating - Inbreeding - Migration of alleles - None of the above is correct

Genetic drift

Periodic, sometimes catastrophic, events in which extinction rates increase dramatically are called: - Mass extinctions - Macroevolution - Bimodal evolution - Noah extinctions - None of the above is correct

Mass extinctions

Although no consensus exists for the definition of species, most biologist would agree that there are three important criteria which includes all of the following except? - Descent of all members form a common ancestral population - Reproductive compatibility within and reproductive incompatibility between species - Maintenance within species of genotypic and phenotypic cohesion - Members of species cannot vary in phenotype - None of the above is correct

Members of species cannot vary in phenotype

Which of the following is NOT correct? - Darwin's theory of gradualism opposed arguments for the sudden origin of species - New traits are always produced by phenotypic gradualism - Phenotypic gradualism is not often revealed by the fossil record - Punctuated equilibrium is one explanation for the discontinuous evolutionary changes observed throughout geologic time. - All of the above are correct

New traits are always produced by phenotypic gradualism

Which of the following is mismatched? - Ontogeny: the history of the development of an organism through its entire life - Recapulation: biogenetic law - Heterochrony: evolutionary change in timing of development - Paedomorphosis: the retention of ancestral juvenile characters by the adults of descendants - None of the above is mismatched

None of the above is mismatched

Which of the following is NOT correct? - Potassium-argon dating: radiometric dating to 1.3 billion years - Cambrian explosion: nearly 600 million years BP - Evolution of horses: only a single genus, Equus, survives - Perpetual change: species are fixed and unchangeable - All of the above are correct

Perpetual change: species are NOT fixed and unchangeable

The branching tree of evolution is called: - Speciation - Phylogeny - Common descent - Shared ancestry - None of the above is correct

Phylogeny

Different allelic forms of genes encode proteins that may differ slightly in their amino acid sequence. The phenomenon is called? - Genetic variation with populations - Heterozygosity - Protein polymorphism - Quantitative variation - None of the above is correct

Protein polymorphism

Biological features that prevent different species from interbreeding are called? - Phenotypic barriers - Reproductive barriers - Systematic barriers - Evolutionary barriers - None of the above is correct

Reproductive barriers

Darwin used which of the following terms to denote the selection of traits that are advantageous for obtaining mates but may be harmful for survival? - Relative fitness - Sexual selection - Allelic selection - Hardy-Weinberg equilibrium - None of the above is correct

Sexual selection

Which of the following is mismatched? - Hyrbidization: matings between divergent populations - Premating barriers: impair fertilization to prevent populations from interbreeding - Sibling species: species that are indistinguishable - Sympatric speciation: speciation due to allopatry - All of the above are correct

Sympatric speciation: speciation due to allopatry Sympatric speciation is nonallopatric.

The first scientific explanation of evolution was formulated by Jean Baptiste de Lamarck, who outlined his idea of inheritance of acquired characteristics. Which of the following scenarios did Lamarck use to support his theory? - Evolution of insects resistant to pesticides. - Giraffes evolving long necks by stretching to obtain food. - Transformational forms in fossil records. - Evolution based on differential survival and reproduction among organisms. - None of the above would fit Lamarck's theory of evolution.

Transformational forms in fossil records.

August Weismann rejected Lamarckian inheritance by showing experimentally that modifications of an organism during its lifetime do not change its heredity. True or False

True

Darwin proposed that all plants and animals have descended from an ancestral form. True or False

True

Darwin's book, "The Descent of Man and Selection in Relation to Sex" was devoted to the idea that humans share a common descent with apes and other animals. Darwin built his case largely on anatomical comparisons revealing homology between humans and apes. True or False

True

Darwinian evolutionary theory is the dominant paradigm of biology. It is a theory that is supported by the evidence and has never been disproved. True or False

True

Earth's rock strata record the irreversible, historical change that we call organic evolution. True or False

True

Fossils, on rare occasions, may include soft tissues preserved so well that cellular organelles can be observed through electron microscopy. True or False

True

Natural forces are responsible for the geological features of the Earth. True or False

True

Natural selection is the major process by which evolution occurs in Darwin's theory of evolution. True or False

True

Several independent methods of radiometric dating are now used, which involve the radioactive decay of naturally occurring elements into other elements. True or False

True

The "law of stratigraphy" produced a relative dating method with the oldest layers at the bottom and the youngest at the top. True or False

True

The nested heirarchial structure of homology is so pervasive in the living world that it forms the basis for our systematic classification of all forms of life. True or False

True

There is differential survival and reproduction among varying organisms in a population. True or False

True

The extinction that marked the end of the dinosaurs as well as numerous marine invertebrate taxa is called the Cretaceous extinction. True or False

True. Also called "Cretaceous-Paleogene extinction event" or "Cretaceous-Tertiary extinction"

The part of evolutionary theory termed "multiplication of species" pertains to? - When an ancestral species has split into two different ones - New species gradually appearing in the fossil record - New species formed from older, ancestral species - All species increasing geometrically - None of the above is correct

When an ancestral species has split into two different ones