Multiple choice

Which of the following is correct?

  1. Platypus lays eggs.

  2. All the organisms that fly are birds.

  3. Whales respire by gills.

  4. Fishes have cartilagenous skeleton only.

  5. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Platypus is the only mammal that lays eggs instead of giving birth to young ones.