Multiple choice

Which of the following is a characteristic of Mammalia?

  1. Forelimbs are modified into wings.

  2. The body is covered with feathers and scales.

  3. Skin bears a number of sweat and oil glands.

  4. Mammary glands are absent.

  5. Bones of mammals are hollow or pneumatic.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option.

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