The testes have an additional enzyme, which converts androstenedione to testosterone:

#Question id: 4714

#Unit 11. Evolution and Behavior

After the drought of 1977, researchers hypothesized that on the Galápagos Island Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at the finches. Which of these events is now most likely to occur to finch beaks on this island?

#Question id: 4715

#Unit 11. Evolution and Behavior

Claytonia virginica is a woodland spring herb with flowers that vary from white, to pale pink, to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time?

#Question id: 4716

#Unit 11. Evolution and Behavior

Which of the following is correct match?

#Question id: 4717

#Unit 11. Evolution and Behavior

 If Darwin had been aware of genes and their typical mode of transmission to subsequent generations, with which statement would he most likely have been in agreement?

#Question id: 15716

#Unit 11. Evolution and Behavior

#Question id: 15717

#Unit 11. Evolution and Behavior