To pump and circulate blood is the work of which organ? * 0Brain
O Heart
O Lungs
O Small intestine

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.

b. climate change will cause an increase in biodiversity of all ecosystems.

hope this