Answer:
Answer is A signal is sent down an exon within a nerve cell.
Explanation:
Dinosaurs became common on land
Mitosis produces all animal and plant cells
By dying after mating in order to feed the young.
<h2>Some bacteria are facultative anaerobes, which usually produce ATP by aerobic respiration but are also capable of switching to fermentation when there is a lack of _____OXYGEN____ in their environment. </h2>