QUESTION
A duck has a thick layer of fat just beneath its skin. In addition to making the duck more buoyant, this fat helps it stay warm in cold water.a. Why does the duck have trouble maintaining its body temperature in cold weather?b. Why does the duck have more trouble staying warm in cold water than in cold air?c. How does the layer of fat help the duck keep warm?d. Fat is relatively rigid but is chemically almost indistinguishable from liquid oil. Why wouldnât liquid oil be as effective as semi-rigid fat at keeping the duck warm?e. Muscle tissue is also relatively rigid, but having an extra layer of muscle wouldnât be as effective at keeping the duck warm as the layer of fat. Why not?f. The duckâs oily feathers also tend to trap air near its skin so that cold water doesnât actually touch the duckâs skin. Why does this trapped air help keep the duck warm?
ANSWER:
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