Begin by making a list of questions that will help you conduct research on the topic. To get you started, here are some questions that may lead you to a better understanding of the topic: •How does artificial selection differ from natural selection?
•How did modern dogs 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.

not sure if this is what you'r looking for nnew= nold

the answer is c.

by: nicholas dooley