Question

Animals of ___________ possess a four-chambered heart and lay eggs with a brittle shell. They are warm-blooded.

• A. Class Mammalia
• B. Class Reptilia
• C. Class Amphibia
• D. Class Aves
• E. Class Pisces

Answer 1

The correct option is D Class Aves

Fishes have two-chambered hearts and are cold-blooded.

Reptiles and amphibians have three-chambered hearts and are cold-blooded.

Mammals have four-chambered hearts and do not lay eggs (except platypus).

All birds are warm-blooded, possess four-chambered hearts, and lay eggs.

Hence, the correct answer is option D.