What abiotic and biotic features help scientists define biomes

The abiotic factors in an ecosystem are all the nonliving elements, which is the air, water, soil tempature, etc., But the biotic factors are all the living organisms in that ecosystem.

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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