If the mucus in the air track of mammals dry up and the h...
If the mucus in the air track of mammals dry up and the hairs in the nostrils are removed
impure air would be breathed into their lungs
the speed of air movement into their lungs would increase
breathing air into their lungs would be difficult
more air would be taken into their lungs
Correct answer is A
No explanation has been provided for this answer.
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