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Transcript
Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
16.3 Directed Reading
Section: Beyond Darwinian Theory
Complete each statement by writing the correct term in the space provided.
1. Only ______________________ and not ______________________
can evolve.
2. Natural selection can act only on ______________________ variation that
exists in a population.
3. ______________________ is the formation of new species as a result of
evolution.
4. Changes in the genes of populations are known as ______________________,
whereas speciation is part of the process of ________________________.
5. Members of a species are closely related and can mate to produce
_____________________ offspring.
Read each question, and write your answer in the space provided.
6. Identify the five processes of microevolution.
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
7. Compare the effects of mutation and genetic drift on the alleles in a
population.
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
8. Give an example of coevolution.
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
5
Evolutionary Theory
Name ______________________________ Class ___________________ Date __________________
Directed Reading continued
In the space provided, explain how the terms in each pair differ in meaning.
9. speciation, adaptive radiation
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
10. gradualism, punctuated equilibrium
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
6
Evolutionary Theory