Evolution

Question 1

Define: Parallel Evolution

Answer 1

Occurs when 2 species sharing a common ancestor evolve in similar ways due to analogous selection pressures.

Question 2

Define: Convergent Evolution

Answer 2

Occurs when 2 species not sharing a common ancestor evolve to become more similar due to analogous selection pressures.

Question 3

Define: Stabilizing Selection

Answer 3

Keeps phenotypes in a narrow range, excluding extremes.

Question 4

Define: Directional Selection

Answer 4

Moves the average phenotype toward one extreme.

Question 5

Define: Disruptive Selection

Answer 5

Moves toward 2 different phenotypes at the extremes and can lead to speciation.

Question 6

Define: Adaptive Radiation

Answer 6

The rapid emergence of multiple species from a common ancestor, each of which occupies its own ecological niche.

Question 7

Define: Inclusive Fitness

Answer 7

Considers an organisms success to be based on the number of offspring, success in supporting the offspring, and the ability of the offspring to then support others.

Question 8

Define: Divergent Evolution

Answer 8

Occurs when 2 species sharing a common ancestor become more different.