Question

3) The magnolia warbler breeds in the Canadian taiga, and overwinters in the tropics. Given the costs of migration, why does it not just stay and breed in the tropics?

a) The tropics are too hot in the summer

b) This warbler is part of nature's plan, and it must migrate to balance the Canadian ecosystems.

c) Competition with other birds in the tropics would likely keep it from amassing the resources it needs to reproduce

d) Migration, a behavior, is of no relevance to physiology, and this question is irrelevant to the subject matter of an animal physiology class.

e) The nesting materials warblers use (andesite, cobalt, and palmetto sticks) are only found in Canada.

12) Which of the following is a potential drawback of adaptation to an extreme environment such as high temperatures, high salinity, or extreme cold?

a) Organisms adapted to extreme environments must have high reproductive rates and long lives to compensate for the challenges of their environment.

b) In terms of the law of tolerance, it means that an organism must evolve during the course of its lifetime to stay in the favorable range.

c) It often comes at the cost of imposing the inability to tolerate other extreme environments

d) Organisms adapted to extreme environments must adapt to less extreme environments as conditions change.

e) There is no cost to adaptation to extreme environments.

20) What is Carrier's constraint?

a) An organism must expend additional metabolic resources when carrying fat reserves for the winter.

b) Lizards and snakes carry the burden of inefficient metabolisms.

c) The need for skeletal support constrains the evolution for the largest terrestrial animals.

d) It is the metabolic limit to activity in a cold blooded animal.

e) None of the above

Answer 1

Felt great to answer. Good luck!