Ascientist discovers a new planet with a blue color in its atmosphere. what can he assume about the planet? a. the planet is very dense. b. the atmosphere contains hydrogen and helium. c. the atmosphere contains methane. d. the planet is not very dense.

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.