Multiple choice

Four chambered heart is found in P. Bony fishes Q. Amphibians R. Aves S. Mammals Select the correct answer using codes given below:

  1. P and Q

  2. P and S

  3. Q and R

  4. Q and S

  5. R and S

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

4 - chambered heart (2 auricles + 2 ventricles) is a characteristic feature of aves and mammals.