Question

Which one of the following animals has two separate circulatory pathways?

• A. Frog
• B. Whale
• C. Shark
• D. Lizard

Answer 1

The correct option is B

Whale

The correct option is B.

Explanation of correct option:

1. In double circulation, blood flows twice through the heart.
2. Pulmonary circulation (between the heart and lungs) and systemic circulation (from the heart through the rest of the body) is separated.
3. It is found in mammals and birds.
4. A whale is a mammal that has two separate circulatory pathways.

Explanation of incorrect option:

Option A

Frogs have a close circulatory system with a three-chambered heart.

Option C

Sharks have a simple circulatory system with an auricle and a ventricle.

Option D

Lizards have a closed circulatory system with a three-chambered heart.

Final answer: Whale has two separate circulatory pathways