Question

The mature RBC of which of the following has nucleus?

• A. Frog
• B. Rabbit
• C. Both A and B
• D. None of the above

Answer 1

The correct option is A Frog

All mammals RBC's lack nucleus at maturity but the camel is an exception to this fact, as it posses nucleus in its RBC's even at maturity.

Mammals don't have a nucleus in their red blood cells, because they need more oxygen than frogs, so their red blood cells eliminate the nucleus to fit more oxygen. Frogs can breathe under water and in air, so they don't need much oxygen, so their red blood cells didn't eliminate the nucleus.

Hence, option A is correct.