Answer:
A
Explanation:
Homeostasis' main job is to keep your body balanced, typically with variable factors such as temperature or enzyme amounts. Your heart rate increases to keep your blood pressure steady while you exercise. This way, you can have a relatively balanced blood pressure as you exhilarate yourself.
<span>Methyl groups
</span>DNA<span> methylation is a process by which </span>methyl groups<span> are added to the </span>DNA<span> molecule. Methylation can change the activity of a </span>DNA<span> segment without changing the sequence.</span>
