In the following experiments, the researcher wants to alter the amount of flour, sugar, and butter in several batches of cookies and perform a poll to determine
which batch of cookies is the tastiest. Manipulation of the which of the following
variables would be an example of a negative control?

then that particular organisms become extinct.

but there is no

i guess you forgot putting it.

human didn't come from monkeys man i hate these stupid teachers

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.