1 - Gavilan College



Describe the theory of evolution. Include in your description the four postulates on which the theory of evolution rests.

1. List and explain 10 evidences for evolution.

2. Compare and contrast homologous and analogous structures. Give a few examples of each. Are vestigial structures related to homologous or analogous structures? How are they related?

3. Describe the concept of natural selection. What factors drive natural selection?

4. Describe what is meant by the terms gene pool, allele frequency, and phenotypic frequency.

5. Define the term equilibrium population. What conditions must be met for a population to become an equilibrium population? How common are these conditions?

6. Pigmented hair is dominant to non-pigmented hair. You observe that 4% of the population has non-pigmented hair. What are the frequencies of the dominant and recessive alleles in the population? What are the frequencies of the homozygous dominant genotype and the heterozygous genotype in the population?

(hint: Hardy-Weinberg)

7. What is genetic drift? What conditions make genetic drift more likely? How and why do these conditions make genetic drift more likely?

8. What is the current standard definition of species? What are the limitations of this definition?

9. How are new species formed? What is adaptive radiation?

10. Describe each of the ways that populations within an ecosystem can interact.

11. Describe the ways that community interactions can affect evolution?

12. Define the terms ecological niche, competitive exclusion, and resource partitioning. How are these terms related? Provide two examples for each of these terms.

13. Describe the several ways that organisms can use coloration and patterning to increase their chances of survival.

14. What is meant by the term keystone species. Describe two examples.

15. Compare and contrast primary and secondary succession.

16. Define the term ecosystem and give an example of a fully functioning ecosystem (multiple species at all trophic levels).

17. Compare and contrast the flow of solar energy and nutrients through the combined ecosystems of the Earth (the biosphere).

18. What is primary productivity? How is it measured? How does it impact an ecosystem? (be specific)

19. Compare and contrast the Nitrogen and Phosphorous cycles. How might disruption of these cycles impact ecosystems?

20. Describe the Carbon cycle. What are the major sinks and sources? How might changes in the Carbon cycle effect the global climate? (again be specific)

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