<span>The answer to the question is hormones. Hormones are unique molecules that the body produces to chemically regulate certain parts of the body. For instance, testosterone is a hormone important for physiological development in humans, an especially important hormone for males.</span>
It's "It prevents the two populations from interbreeding" I just took the test.
<span> barriers such as dead skin cells and mucus</span>
Answer:
Bioluminescence
Explanation:
Jellyfish have bioluminescent proteins. Bioluminescence is when a living organism gives off light through a chemical process. The glow you see is when a substance called luciferin reacts with oxygen.
