Mangroves are trees that grow on the coasts of many tropical countries. Mangroves grow in mud.
The mud is low in oxygen and nutrients.
Mangroves absorb water from sea water (salt water).
Most plants cannot absorb water from sea water.
Mangroves have high levels of salts in their roots.
Suggest why.

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Explanation:

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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.

i hope this : )

well the answer is 2!