What are the sources of the oceans dissolved solids?

Dissolved solids enter the oceans from the chemical weathering of rock on land, from volcanic eruptions, and from chemical reactions between sea water and newly formed sea-floor rocks. One of the biggest differences between ocean water and fresh water is the high concentration of salts in ocean water.

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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.

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meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse