Download Unit 7: Evolution - Blue Valley Schools

Name: ____________________
AP Biology
Biology, Campbell and Reece, 7th Edition
Adapted from chapter reading guides originally created by Lynn Miriello
Unit 7: Evolution
Guided Reading Questions (80 pts total)
Chapter 22 – Descent with Modification: A Darwinian View of Life
1. What were the two major points of Darwin’s publication “The Origin of Species”?
2. Define the following terms:
a. natural selection –
b. evolutionary adaptation –
c. evolution –
d. taxonomy 3. Detail the impact/position/contribution to evolutionary theory made by the individuals below. Also
include a timeframe of the contributions of each person.
a. Aristotle –
b. Linnaeus –
c. Cuvier –
d. Lyell –
e. Lamarck –
f. Malthus –
g. Hutton -
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4. How does catastrophism relate to the ideas of gradualism?
5. How did the Voyage of the Beagle impact Darwin’s research?
6. How did Alfred Wallace impact Darwin in his work?
7. What part did adaptation play in Darwin’s thinking?
8. What did Darwin mean by “descent with modification?”
9. How did the concept of artificial selection impact Darwin’s ideas?
10. What three word phrase summarizes Darwin’s mechanism of evolution?
11. Explain the evolution of drug resistance in bacteria in terms of natural selection.
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12. Define the following terms:
a. homologous structures –
b. vestigial structures –
c. analogous structures 13. What is biogeography and why is it important to the study of evolution?
14. How do the fossil record and sedimentary rock provide evidence to evolution?
AP Biology Exam Checkpoint:
_____ 15. As shown in the diagram above, analysis of forelimb anatomy of humans, bats, and whales shows
that humans and bats have fairly similar skeletal structures, while whales have diverged considerably in the
shapes and proportions of their bones. However, analysis of several genes in these species suggests that all
three diverged from a common ancestor at about the same time. Which of the following is the best
explanation for these data?
A. Whales are not properly defined as mammals.
B. Genes mutate more rapidly in whales than in humans or bats.
C. Humans and bats evolved by natural selection, and whales evolved by Lamarckian mechanisms.
D. Natural selection in an aquatic environment resulted in significant changes to whale forelimb
anatomy.
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Chapter 23 –The Evolution of Populations
1. What is the smallest unit of evolution? Why is this important to understand?
2. Define the following terms:
a. microevolution –
b. population –
c. population genetics –
d. gene pool 3. What is the Hardy-Weinberg Theorem? Why does it appear to be an apparent contradiction to evolution?
4. What is Hardy-Weinberg equilibrium?
5. What are the five conditions for H-W equilibrium to be maintained?
1.
2.
3.
4.
5.
6. How can the H-W equation be used today in terms of human health?
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7. Label the blank diagram to relate the H-W equation to a Punnett square.
8. What are the two broad processes that make evolution possible?
9. Describe the impact of the following:
a. point mutation –
b. gene duplication –
c. sexual recombination 10. What is the relationship between mutation rates and generation span?
11. Define the following processes:
a. genetic drift –
b. bottleneck effect –
c. founder effect –
d. gene flow Page 5 of 14
12. Why is a discussion of adaptive evolution necessary? What role does natural selection play in this
important process?
13. Give examples of phenotypical variation that is NOT inheritable.
14. Explain the terms phenotypic polymorphism and genetic polymorphism in common terms and relying
on examples from your own experience.
15. How do we measure genetic variation?
16. How can very small differences in nucleotide sequences lead to such diversity in the human population?
17. What is geographic variation and how does the term “cline” relate to this process?
18. What is different about the terms fitness and relative fitness?
19. Why is it said that evolution acts on phenotypes and not genotypes?
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20. Label the diagram below to differentiate between the modes of selection.
21. How does diploidy preserve genetic variation?
22. How does balancing natural selection relate to the term balanced polymorphism?
23. Define and give an example of the following terms:
a. heterozygote advantage –
b. frequency dependent selection –
c. neutral variation –
d. sexual dimorphism –
e. intrasexual selection –
f. intersexual selection Page 7 of 14
23. What are the limitations to natural selection?
AP Biology Exam Checkpoint:
_____ 25. At a locus with a dominant and a recessive allele in Hardy-Weinberg equilibrium, 16% of the
individuals are homozygous for the recessive allele. What is the frequency of the recessive allele in the
population?
A. 0.36
B. 0.40
C. 0.48
D. 0.60
Chapter 24 –The Origin of Species
1. Define the following terms:
a. speciation –
b. anagenesis –
c. cladogenesis 2. What is the biological species concept?
3. What are the differences between prezygotic and postzygotic barriers to reproduction?
4. Identify each of the following as prezygotic or postzygotic barriers and write a brief definition of each:
a. habitat isolation –
b. temporal isolation –
c. behavioral isolation –
d. mechanical isolation –
e. gametic isolation –
f. reduced hybrid viability –
g. reduced hybrid fertility –
h. hybrid breakdown Page 8 of 14
5. Explain these concepts of species:
a. morphological species concept –
b. paleontological species concept –
c. ecological species concept –
d. phylogenetic species concept 6. What is the basis for allopatric speciation?
7. What does sympatric speciation mean?
8. What is the difference between autopolyploidy and allopolyploidy?
9. In what types of organisms are polyploidy speciation more common and why do you think this occurs?
10. What is adaptive radiation and why do island chains tend to be discussed often with this topic?
11. Compare and contrast the models of punctuated equilibrium to gradualism as models for the rate of
evolution. Does one have to exclude the other?
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12. Define the following terms:
a. heterochrony –
b. paedomorphosis –
13. What are homeotic genes? What impact have the Hox genes had on vertebrates?
14. How does the evolution of the horse exemplify the concept that evolution is driven by the interactions
between organisms and their environments?
AP Biology Exam Checkpoint:
_____ 15. A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate
limb bud instead of farther back is thought to have made possible the evolution of the tetrapod limb. This
type of change is illustrative of
A. the origin of a new species due to allopolyploidy.
B. the influence of environment on an individual's development.
C. paedomorphosis, or retention of ancestral juvenile structures in an adult organism.
D. a change in a developmental gene or in its regulation that altered the spatial organization of body parts.
Chapter 25 –Phylogeny and Systematics
1. Define the following terms:
a. phylogeny –
b. systematics –
c. molecular systematics –
d. homoplasies –
e. taxonomy –
f. binomial nomenclature –
g. phylogenetic trees –
h. cladogram –
i. clade –
j. cladistics –
k. shared primitive character –
l. shared derived character Page 10 of 14
2. Use the following blank diagram to compare and explain monophyletic, paraphyletic and polyphyletic –
include the definition of each term in your diagram.
3. What is the relationship between the ingroup and the outgroup in classification?
4. What is the difference in the meaning between the lengths of lines in a phylogram and ultrametric tree?
5. Use a dictionary to look up the term parsimony and write its definition in the space below:
6. How is the principle of parsimony applied to understanding evolution?
7. What is the principle of maximum parsimony and the principle of maximum likelihood?
8. What is the difference between orthologous genes and paralogous genes?
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9. What is the concept of a molecular clock and how is it useful?
AP Biology Exam Checkpoint:
_____ 10. How would one apply the principle of parsimony to the construction of a phylogenetic tree?
A. Choose the tree with the fewest branch points.
B. Choose the tree in which the branch points are based on as many shared derived characters as possible.
C. Base phylogenetic trees only on the fossil record, as this provides the simplest explanation for evolution.
D. Choose the tree that represents the fewest evolutionary changes, either in DNA sequences or morphology.
Chapter 26 – The Tree of Life: An Introduction to Biological Diversity
1. Define the following:
a. protobionts –
b. ribozymes –
c. radiometric dating –
d. half-life –
e. magnetic reversals –
f. geologic record –
g. stromatolites –
h. serial endosymbiosis –
i. Pangea –
j. three domain system 2. According to the best scientific evidence currently available, how old is the Earth?
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3. Label the diagram. Then describe and explain Urey
and Miller’s 1953 experiment.
Explanation:
4. Where were the first organic compounds on Earth
probably formed?
5. Explain the evidence that has led scientists to infer that RNA developed before DNA.
6. What did the atmosphere of early Earth primarily consist of?
7. Write a short paragraph to explain serial endosymbiosis. Draw a diagram to support your explanation.
8. During which geological period are we currently living?
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9. List the periods in which there were mass extinctions, and summarize the current hypotheses about the
causes of each extinction.
10. When did the first prokaryotes evolve? How did the evolution of prokaryotes change the early Earth?
11. Name several traits of the first prokaryotes.
12. Contrast the five kingdom system with the three domain system.
13. Mitochondria and plastids likely formed in eukaryotes in what way?
14. How, when, and by whom, was the first concept of taxonomy set up?
AP Biology Exam Checkpoint:
_____ 15. Which of the following represents a probable sequence of events in the biological history of Earth?
A. metabolism before mitosis
B. DNA genes before RNA genes
C. eukaryotes before prokaryotes
D. an oxidizing atmosphere before a reducing atmosphere
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