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BIOLOGY

JAMB 2006 - Question 35

Biology 2006 JAMB Past Questions - Question 35: Which of the following vertebrates has the most simple structured heart?

Choose the most appropriate option for the gap .

Which of the following vertebrates has the most simple structured heart?

A: Reptile

B: Fish

C: Mammal

D: Amphibian

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Correct Answer

Explanation

BVertebrates show progressive complexity in the structure of theirhearts. Fishes are the most primitive of all vertebrates. They have heart withone auricle and one ventricle. Amphibians have heart with two auricles and aventricle while that of reptiles consist of two auricles and a. partiallydivided ventricle. Aves and mammals have the most complex heart consisting oftwo auricles and two ventricles.