Which one of the following is a density-dependent limiting factor for a group of rattlesnakes? A) Amount of prey

B) Surrounding temperatures

C) Amount of precipitation

D) Soil quality

... A disease resulting in the deaths of one third of a dense population of bats in a cave would be a

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.