<h2>
Answer: Some regions of a polypeptide may coil or fold back on themselves. This folding is called <u>
Secondary structure </u>
and the coils or folds are held in place by <u>Hydrogen Bonds</u></h2>
I'm pretty sure it's B, I may be wrong let me know if I am.
The release of Follicle Stimulating Hormone (FSH) encourages sustentocytes to release androgen-binding protein (ABP). ABP causes the spermatogonia to bind testosterone. <span>Testosterone stimulates spermatogenesis. Hope this answers the question. Have a nice day.</span>
Answer: b. Nitrogen; Oxygen
Explanation:
The air is a mixture of gases in the following percentage;
Nitrogen; 78%
Oxygen : 21%
Carbon(IV)Oxide : 0.03%
Argon : 0.9%
Others ( minute traces of Neon, Helium, Methane e.t.c) : 0.17%
