Bio 11A ch 21.1-21.6
Which of the following statements about marsupials in Australia is true?
For many types of placental mammals found throughout the world, there is a strikingly similar marsupial mammal in Australia.
How did Bernard Kettlewell test Tutt's hypothesis about peppered moths?
He released marked dark and light moths in polluted and unpolluted woods and determined their survival.
Which of the following best distinguishes vestigial from homologous structures?
Homologous structures are functional, while vestigial structures have no function.
Why are giraffe necks not perfectly suited for their function?
Like all mammals, giraffes only have 7 vertebrae in their necks which limits their flexibility.
The primary process responsible for evolution is _____ ______ .
Natural selection
In the laboratory setting, selection for a trait in fruit flies
has consistently lead to a strong, predictable evolutionary response
Match the different types of anatomical evidence for evolution to an example. Instructions
homology = vertebrate forelimb embryonic development = lanugo vestigal structure = human coccyx
One of the best studied examples of evolutionary change is that of the _______family. This family includes zebras and donkeys, among other animals.
horse
The primary difference between natural and artificial selection is
how the parents are chosen (by humans or because of their reproductive success)
Starting in 1850 when Europe become industrialized, the frequency of melanic forms of the peppered moth in populations ______ until they made up ______ of some population.
increased; almost 100%
In certain areas of the world, populations of moths have been shown to change over the years with dark forms becoming more abundant than light forms; this phenomenon is called
industrial melanism
The phenomenon, where dark forms of moths become more prevalent than light forms in industrialized areas, is known as .
industrial melanism
Even though there are gaps in the fossil record, some of the most direct evidence for evolution comes from fossils called ______ fossils that illustrate how certain major transformations in life forms occurred. Select all that apply.
intermediate transitional
Today, fossils have been found that link
all major groups of vertebrates
Economically important organisms that have been modified significantly through artificial selection include
cattle pigs corn
Structures that have evolved separately but look very similar exhibit __________evolution; in contrast, structures that evolved through modification from a common ancestral trait are -----structures.
convergent homologous
True or false: Even though humans have used artificial selection for centuries, only animals have been significantly modified by our efforts.
false
Which of the following is the most direct evidence for evolution?
fossils
What type of evidence for evolution is provided by fossils?
direct
One of the most successful studies in showing evolution by natural selection is the one done by Peter and Rosemary Grant on the Galápagos islands; these scientists studied a bird that was referred to by the common name of ______________ ___________finch
medium ground
Review the following list of processes that can alter the genetic make up of a population. Which one is considered by scientists to be primarily responsible for evolution?
natural selection
The observation that the relative frequencies of melanic to light peppered moths changes with the color of tree bark provides support for
natural selection
Varieties of which of the following organisms are the result of artificial selection?
pigeons corn dogs cats
As a result of convergent evolution, many marsupial mammals of Australia look similar to________ mammals found elsewhere and occupy a similar ecological niche.
placental
As a result of convergent evolution, many marsupial mammals of Australia look similar to_________- mammals found elsewhere and occupy a similar ecological niche.
placental
Molecular analysis of lactase DNA______ in humans shows that genes for that enzyme have_________ evolved in Africa and Europe to produce the same result.
sequences independently
Fast swimming marine predators such as dolphins, sharks, and tuna, have a _________-body shape that minimizes__________ in the water.
similar, streamlined or sleek friction, resistance or drag
What types of species are most likely to be able to disperse to an island (choose all that apply)?
species that fly species that drift species that float
True or false: Natural selection does not always produce perfectly working adaptations, because it can only work on the genetic variation present in a population.
true
Prior to 1850, the melanic form of the peppered moth in Europe was:
very rare
The evolution of members of the horse family is
well-documented by the fossil record.
The medium ground finch of the Galápagos islands feeds on small seeds, produced in abundance during______ years.
wet
Some species, for example, frogs, are very sensitive to saltwater and therefore have almost no chance of island colonization. Why is saltwater so harmful to these animals?
It causes those animals to dehydrate.
Which of the following provide evidence that natural selection occurs in peppered moths?
Light moths become more abundant than melanic forms when clean air legislation is implemented. Melanic moths become more abundant than light forms in polluted areas.
How has rock and fossil dating changed since Darwin's times?
Relative dating was used in the past; today we use absolute dating.
Which of the following is true about transitional fossils (choose all that apply)?
They illustrate how major transitions in life occurred. They help to fill in the gap in the fossil record between two separate groups
How has the fossil record changed since Darwin?
Today the fossil record is far more complete.
How are traits produced by convergent evolution different from homologies?
Traits produced by convergent evolution have not evolved from a common ancestral trait, while homologies have.
Which of the following are reasons why island trees belong to plant families that typically do not have tree members (for example the sunflower family)?
Tree seeds rarely make it to isolated islands The tree niche is empty and so a flower can evolve through natural selection to be tree-like
In ___________selection, humans choose the parents of the next generation, while in _______selection, organisms that survive and reproduce are those that pass their genes on.
artificial natural
The great variety of breeds of cats, dogs and other domestic animals have arisen through
artificial selection
One of the most important features of Galapagos finches is that the shape of their_______is related to their______ habits.
beaks, beak, or bills feeding, eating, food, dietary, diet or food gathering
Bernard Kettlewell tested Tutt's hypothesis on peppered moths by releasing__________ numbers of dark and light individuals into two sets of woods, and then recapturing and counting the dark and light individuals that________ in each of the woods.
equal, even, identical or the same survived or remained
In all cases when scientists have performed artificial selection experiments on fruit flies, a strong and predictable _________response has been observed.
evolutionary
Structures that are derived from a common ancestor but with different appearance and function are called ________structures, while _______-structures refers to structures that have little or no function but were functional in an ancesto
homologous vestigal
The forelimbs of vertebrates are an example of _______structures, while the human appendix is an example of a ______structure.
homologous vestigal
Match the type of rock dating with its description. Instructions
relative dating= rocks are dated based on their position absolute dating= rocks are dated based on changes in their isotopic composition
Galapagos finches with powerful thick beaks typically eat large
seeds