Which of the following best describes the influence of latitude on climate? a. earth's climate zones are produced by the equal distribution of the sun's heat across the earth's surface. b. less direct solar energy affects areas near the equator than it does at the poles. c. temperate regions receive more solar energy and heat per unit area than tropical regions. d. polar regions receive less solar energy and heat per unit area than tropical regions.

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