Identify some changes in genetic traits that have occurred over several generations in an agriculture crop.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

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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