Which of the following statements is part of the cell theory?
A.
All living things are made up of one or more cells.
B.
Cells are the basic units of living things.
C.
All cells come from pre-existing cells.
D.
all of these

answer; i believe the correct answer is (data); /// good luck

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explanation:

b r

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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.