Biotic factors of an ecosystem could include which of the following? a. the quantity of water available b. all animal populations c. all types of plants d. the temperature range

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

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.