Question

Which is the common character between all the mammals _______________.

• A. They are oviparous.
• B. They are herbivorous.
• C. They are carnivorous.
• D. Female have functional mammary glands.

Answer 1

Answer: (D)

Female have functional mammary glands.

• All females of the class Mammalia have mammary glands. The glands produce milk after the birth of offspring. Milk is a nutritious fluid. It contains disease-fighting molecules as well as all the nutrients a baby mammal needs. Producing milk for offspring is called lactation.
• Most mammals give birth to live young, but a few (the monotremes) lay eggs.
• Mammals can be both herbivorous and carnivorous.

So, the correct answer is option D.