Lipids commonly contain fatty acids. What are the two parts of a fatty acid? Check the correct answers below. amino group

long chain of carbon and hydrogen

carboxyl group

R group

nucleotide

b) long chain of carbon and hydrogen

c) carboxyl group

Explanation:

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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