Which of the following characters does not fit for Aves?

Skin is dry, without glands except oil glands at the base of tail.

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Alimentary canal has 2 additional chambers, crop and gizzard.

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Hind limbs are modified for walking, swimming or clasping. forelimbs are modified into wings.

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Beak has teeth.

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Solution

The correct option is D Beak has teeth.
Aves have -
Dry skin, without glands except oil glands at the base of tail.
Two additional chambers of alimentary canal i.e., crop and gizzard.
Wings modified from forelimbs.
Hind limbs modified for walking, swimming, or clasping.
But, their beaks don't have teeth.
So, the correct answer is (D).

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