Hi!
The answer is <span>D. Epinephrine widens the air passageways in the lungs.
Hope this helps!
-Payshence xoxo
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For the answer to the question above, the <span>head circumference is a means of assessing brain growth.
It means that even though her daughter is premature. She's growing normally and without any brain problem or whatsoever and she's healthy.
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Genetic variation<span> occurs </span>mainly<span> through DNA mutation, gene flow (movement of genes from one population to another) and sexual reproduction</span>
All the above is correct.