If free oxygen was not present in the primitive atmosphere of the earth then the first organisms to evolve most likely

anaerobic

Explanation: i hope this helped plz mark me brainliest

<3 <3 <3 :)

the answer is: reproductively

i think i spelled it wrong lol

anyways hope i

-lavira: )

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.