Hydrogen and oxygen react to form water. At anatomic level, how do we know that a chemical reaction has occurred

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.

c. establishing proper sleep hygiene

i think the answer is a.keratin is the pigment responsible for skin color.