FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is a structural adaptation of ducks that is most helpful in keeping them dry:
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An oil-producing gland
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Hollow fur
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Darkly colored plumage
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Ability to float
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Explanation:
Detailed explanation-1: -Ducks are wide-ranging, found on every continent except Antarctica. They live in both fresh and sea water and are well adapted to their aquatic home. In fact, their feathers are so waterproof that the underlayer of downy feathers remain dry even when they dive!
Detailed explanation-2: -Wings and feathers are the most obvious adaptations waterfowl and other birds have for flying. Although the size and shape of the wing varies among species, all waterfowl have relatively long, pointed wings built for speed. Rigid primary feathers provide thrust, and uniquely shaped secondary feathers provide lift.
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