I believe that you're question is referring to homeostasis
Answer:
D.Most bilaterians have tissues but some do not.
Explanation:
<u><em>Photosystem I</em></u> is found in the membrane facing the inside of the grana and <u><em>Photosystem II</em></u> is found in membrane facing the stroma
The pituitary hormone that stimulates the interstitial cells to secret testosterone is <u>LH </u><u>[</u><u>Luteinizing </u><u>H</u><u>ormone</u><u>]</u><u>.</u>