Question

Assertion :All terrestrial vertebrates are air breathers. Reason: They have developed lungs for air breathing, an adaptation for land life.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

All terrestrial vertebrates are air breathers. They have developed lungs as their respiratory organs for air breathing. This is an adaptation for land life. They breathe in air through nostrils. The inhaled air later enters the lungs. There is utilization of oxygen from the air to exchange with carbon dioxide from tissues. This gaseous exchange happens in the lungs. Aquatic animals have special structures called as gills for respiration. These aquatic organisms take in water through their mouth. Dissolved oxygen in water is utilized near the gills to be exchanged with carbon dioxide from tissues.

Thus, the correct answer is option A.