Will give a brainlest as farming became more productive, more people were able to spend more time farming engage in manufacturing practice soil conservation move from place to place

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

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.

i hope this : )