Why is mitosis important to unicellular organisms? A. Mitosis is the way in which different types of cells are created
B. Mitosis is the way in which new cells are created
C. Mitosis is the way in which two cells come together to form daughter cells
D. Mitosis is the way in which cells become larger in size

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.