Answer:
I think the answer is D.
Explanation:
D. Red blood cells are produced by bone marrow.
Not 100% sure
B.) amino acids are the building blocks of proteins.
Lipids are made of nonpolar fatty acids among many others.
Enzymes are proteins that lower the activation rate of many chemical reactions.
Collagen consists of amino acids forming connective tissues.
True I’m pretty Shute had this on a test once and I got it right
Answer:
Girls develop breasts, and start to get their period. Boys start to develop facial hair and start to get a deeper voice.
Explanation:
Here