Rachel carson’s warning in silent spring was focused on
a. overgrazing by livestock
b. global warming
c. the misuse of pesticides
d. fish stock declines

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.