#Question id: 3276
#Unit 11. Evolution and Behavior
Which of these conditions are always true of populations evolving due to natural selection?
Condition 1: The population must vary in traits that are heritable.
Condition 2: Some heritable traits must increase reproductive success.
Condition 3: Individuals pass on most traits that they acquire during their lifetime.
#Question id: 3277
#Unit 11. Evolution and Behavior
Which of the following describes the most likely order of events in allopatric speciation?
#Question id: 3278
#Unit 11. Evolution and Behavior
What does the biological species concept use as the primary criterion for determining species boundaries?
#Question id: 3279
#Unit 11. Evolution and Behavior
Which two of the following have operated to increase divergence between mosquito fish populations on island?
a. improved gene flow
b. bottleneck effect
c. sexual selection
d. founder effect
e. natural selection
#Question id: 3280
#Unit 11. Evolution and Behavior
Small populations are threatened by the loss of genetic diversity from
a. Inbreeding
b. Genetic drift
c. Limited mating
#Question id: 3281
#Unit 11. Evolution and Behavior
One population X has 750 AA, 0 Aa, and 250 aa; the other Y has 500 AA, 500 Aa, and 0 aa. After one generation of random mating, the genotype frequencies X and Y respectively if the population size remains 1,000.