Why do genes only make up a small percentage of DNA? A. We only use a small portion of DNA, because there aren't that many unique proteins.
B. It reduces the chances of genes being damaged.
C. It prevents cells from accidentally making the wrong protein.
D. The extra DNA will eventually be turned into genes as organisms evolve.

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.

what school and grade?