During which of the following chemical changes does a precipitate form?
a) vinegar is added to baking powder
b) lemon juice is added to milk
c) lemon juice is added to water
d) a banana ripens

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.

what in the weirdo : o