Most land-dwelling invertebrates and all of the amphibians

Most land-dwelling invertebrates and all of the amphibians 

A) are ectothermic organisms with variable body temperatures.
B) alter their metabolic rates to maintain a constant body temperature of 37°C.
C) have a net loss of heat across a moist body surface, even in direct sun.
D) are endotherms but become thermoconformers only when they are in water.
E) become more active when environmental temperatures drop below 15°C.






Answer: A

An example of an organism that has only behavioral controls over its body temperature is the

An example of an organism that has only behavioral controls over its body temperature is the 

A) green frog.
B) penguin.
C) bluefin tuna.
D) house sparrow.
E) gray wolf.





Answer: A

The panting responses that are observed in overheated birds and mammals dissipates excess heat by

The panting responses that are observed in overheated birds and mammals dissipates excess heat by 

A) countercurrent exchange.
B) acclimation.
C) vasoconstriction.
D) hibernation.
E) evaporation.





Answer: E

Endothermy

Endothermy 

A) is a characteristic of most animals found in tropical zones.
B) is a characteristic of animals that have a fairly constant body temperature.
C) is a term equivalent to cold-blooded.
D) is a characteristic of mammals but not of birds.
E) is seen only in insects and in certain predatory fishes.





Answer: B