Some fish that live in pitch-dark caves have things that look like eyes but do not see. Are their eyes best described as an exaptation or a vestigial adaptation?

It is adaptation

Explanation:

I had this question on my test last week

explanation:

okay now i don't know this but for the pints nothing else to say bye

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.