Stars are classified by properties such as temperature, color, size, absolute brightness, and apparent magnitude. Some of these factors are directly related Which of the following factors is most directly related to the temperature of a star?
O apparent magnitude
O life cycle stage
color
O size

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.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.