B. Wind.
A abiotic factor is non-living, making a, c and d wrong.
Answer:
A. Valine has replaced glutamic acid
Explanation:
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<span>Tropics
A lot of rain falls there, so the possibility of acid rain and smog which can be carried by warm humid air can also form. </span>
The food that is undigested and fails to break down becomes stool because it can not be used.
Noctiluca is a dinoflagellate in the Domain Eukaryota, Superphylum Alveolata, Phylum Dinoflagellata, in the class Noctiluciphyceae, and in the order Noctilucales.