MHT CET · BIOLOGY · STD 12 - 8. Respiration and Circulation

Rate of breathing in new born is about _________ times per minute .

A 44
B 12
C 16
D 20

Verified Solution

Answer & Solution

Correct Answer

(A) 44

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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	Column I (Animals)		Column II (Respiratory organs)
i	Sponges	a.	External gills
ii	Insects	b.	Plasma membrane
iii	Limulus	c.	Tracheae
iv	Amphibian tadpoles	d.	Book gills