Caroline decided to raise chickens for her 4-h project. during the year, caroline kept close watch on the health and habits of her chickens in the coop. in the hierarchy of life, caroline's chickens would comprise a
a) group.
b) habitat.
c) organism.
d) population.

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.

carbon atoms, hydrogen, oxygen, and nitrogen.

answerblank(1); ecological; blank(2); evolutionary;