1.

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» Correct Answer - a
Respiration if by lungs in Class Aves (birds). The lungs are spongy and inelastic. Air sacs are connected to lungs to supplement respiration.


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