Question

Assertion :Air sacs are connected to lungs in Class Aves.
Reason : Air sacs supplement respiration in birds.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

Respiration is by lungs in Class Aves (birds). The lungs are spongy and inelastic. Air sacs are connected to lungs to supplement respiration.