If a gene is said to be highly conserved, what do we think we know about
it? Select all that apply.
-Its sequence is probably shared among a lot of organisms
-Its sequence will never change
-It probably appeared a long time ago in an ancient ancestor
-It is probably very important
-It probably appeared very recently

I would say A, C, and D

Explanation:

If we know a gene is highly conserved then the gene sequence is similar among different organisms suggesting a common ancestor, and because it does not change then it's role must be very important.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

meiosis is the correct answer