Which of the following is an organism whose cells do not have a membrane- bound nucleus?
A. An animal
B. A eukaryote
C. A prokaryote
D. A plant

C. A prokaryote

Explanation:

A prokaryote is an organism that consists of a single cell that does not have a nucleus or membrane-bound organelles.

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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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