In prokaryotic and eukaryotic cells the amount of water in the cell is kept at a steady state. The organelles through which water passes into and out of cell is the A. Cell Membrane B. Cell Wall C. Nucleus D. Ribosomes

Explanation:

not too sure maybe olecranon process

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.