Which organism produces most of the food in an ecosystem Fish

Barnacle

Phytoplankton

Zooplankton

Phytoplankton

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Phytoplankton is the correct answer

Explanation:

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plant because they survive by water, sunlight, ex.

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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