How many chambers are there in fish heart?
Two
The correct option is A
Explanation of the correct option:
Explanation of the incorrect options:
Option B:
Three chambered hearts are found in amphibians and most reptiles except for crocodiles, they contain one atrium and two ventricles.
Option C:
Mammals have four-chambered hearts including crocodiles.
Option D:
Single chambered heart is present in cephalochordates, Herdmania.
Final answer: Two chambers are there in fish heart.