C. because stimuli is how your body responds to something, and in this case, someone's heart rate increases WHEN their blood oxygen drop. Do you see how it responds? ;-)
D. before cells without a true nucleus
Answer:
6==. During spermatogenesis, four sperm result from each primary spermatocyte, which divides into two haploid secondary spermatocytes; these cells will go through a second meiotic division to produce four spermatids
Answer:
Nutrients makes the most sense.
Answer:
adrenal glands
Explanation:
also known as suprarenal glands
