Why are prokaryotes so important to life on earth?

Prokaryotes is important to life on earth because they remove carbon dioxide (carbon cycle) and return it to the atmosphere. It is also a vital part of the nitrogen cycle. Basically, in simple terms if we didn't have them then we wouldn't be able to thrive and survive.

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explanation:

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the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.