ap lectureguide24


AP Biology: CHAPTER 24: THE ORIGIN OF SPECIES

1. Define the term species.

__________________________________________________________________________

__________________________________________________________________________

2. How do the patterns of speciation differ?

a. anagenesis _____________________________________________________________

b. cladogenesis ___________________________________________________________

3. What is thought to be essential for the formation of distinct species rather than a continuum

from one form of life to another?

__________________________________________________________________________

__________________________________________________________________________

4. Define and give an example for each of the following barriers that cause isolation.

a. prezygotic Barriers _______________________________________________________

__________________________________________________________________________

b. habitat Isolation _________________________________________________________

__________________________________________________________________________

c. behavioral Isolation ______________________________________________________

__________________________________________________________________________

d. temporal Isolation ________________________________________________________

__________________________________________________________________________

e. mechanical isolation ______________________________________________________

__________________________________________________________________________

f. gamete isolation _________________________________________________________

__________________________________________________________________________

g. postzygotic barriers ______________________________________________________

__________________________________________________________________________

h. hybrid inviability _________________________________________________________

__________________________________________________________________________

i. hybrid sterility ___________________________________________________________

__________________________________________________________________________

5. Define the Modes of Speciation

a. allopatric speciation ______________________________________________________

__________________________________________________________________________

b. sympatric speciation ______________________________________________________

__________________________________________________________________________

6. How does the antelope squirrel demonstrate allopatric speciation?

__________________________________________________________________________

__________________________________________________________________________

7. What does the concept of “ring species” demonstrate? Give an example.

__________________________________________________________________________

__________________________________________________________________________

8. How do island chains encourage adaptive radiation?

__________________________________________________________________________

__________________________________________________________________________

9. What are the two intrinsic factors that result in sympatric speciation?

__________________________________________________________________________

__________________________________________________________________________

10. How can polyploidy lead to speciation?

__________________________________________________________________________

__________________________________________________________________________

11. Why are allopolyploid hybrids are usually sterile?

__________________________________________________________________________

__________________________________________________________________________

12. What did Hugo de Vries discover in the evening primrose?

__________________________________________________________________________

__________________________________________________________________________

13. What is thought to be the two factors demonstrating sympatric speciation in the cichlids of

Lake Victoria, in East Africa?

__________________________________________________________________________

__________________________________________________________________________

14. Compare gradualism and punctuated equilibrium.

__________________________________________________________________________

__________________________________________________________________________

15. How does microevolution differ from macroevolution?

__________________________________________________________________________

__________________________________________________________________________

16. Identify a couple of factors that could lead to the pattern of evolution we see as divergence?

__________________________________________________________________________

__________________________________________________________________________

17. What does the Mollusk eye demonstrate?

__________________________________________________________________________

__________________________________________________________________________

18. What does the evolution of the horse demonstrate?

__________________________________________________________________________

__________________________________________________________________________

19. Define each of the following evolutionary trends:

a. convergent evolution _____________________________________________________

__________________________________________________________________________

b. analogous traits _________________________________________________________

__________________________________________________________________________

c. parallel evolution ________________________________________________________

__________________________________________________________________________

d. co-evolution _____________________________________________________________

__________________________________________________________________________