Exam 5: The Forces of Evolution and the Formation of Species

Explain why gradualism is considered such a prevalent form of evolution.Given its popularity,why do alternative models like punctuated equilibrium exist?

What is sexual selection? Employing the concepts of reproductive variance and sexual dimorphism,explain how sexual selection results in peculiar morphology of male peacock feathers.

Describe the difference between adaptationist and holist views of evolution.What is a possible reconciliation of these different views?

The idea of __________ asserts that some evolutionary changes may not even involve intermediate forms.

Gene flow cannot counter the deleterious effects of inbreeding.

Explain the mechanics of punctuated equilibrium.What are some problems associated with this type of speciation? Who favors this view and why?

A species' derived characters are __________.

Which of the following summarizes Hamilton's rule?

Macroevolution and punctuated equilibrium help explain __________.

A clade contains species __________.

Sociobiologists seek to explain an animal's social behavior in terms of __________.

Which of the following represents a pre-mating isolation mechanism?

Features that are homologous are similar due to __________.

Which of the following predicts that social animals should behave less competitively toward close kin due to their shared genes?

Explain the relationship between phenotype,genotype,and natural selection.Be sure to include the terms gene frequency,directional selection,and stabilizing selection.

Evolution by natural selection works directly on __________,transforming __________.

Gaps in the fossil record can be explained as episodes of __________.

Mutations of great significance usually occur within one generation.

The frequency of EVC among the American Amish populations is the result of __________.

Adaptations are __________.