(20 pts)
the geologic processes seen on earth today are the same processes that took place in the past. which principle explains this idea?

a) principle of uniformitarianism

b) principle of superposition

c) principle of horizontal originality

d) principle of faunal succession

blah

explanation:

bc blah

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.