Answer:
The answer is A because it erodes rocks away over time
Explanation:
A
Using the concept that :
<span>The skin cell has twice the number of chromosomes as the sperm cell has.
</span>Hence,
<span>The sperm cell has 39 chromosomes.
The skin Cell will have = 39 x 2
= 78 </span><span>chromosomes.</span>
B. Steroid hormone
This is because most hormones are steroids, that send long distance signaling throughout your body.
There is a
transient electro-physiologic dysfunction of the reticular activating system in
the upper midbrain caused by rotation of the cerebral hemispheres on the fixed
brainstem. -The CSF cushions the brain from light trauma in times of more
severe impact, the forces on the brain may be linear, angular, or rotational, in
rotational movement, the head turns around its center of gravity: this is the
primary mechanism causing concussion.
