If you were to extend the prim meridian from point O to the equator how many degrees longitude would it be and what would thus longitude line be called

what is "point O"

Explanation:

a- all cells come from pre-existing cells

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.