You observed light passing through lenses and through a set of prisms. why does refraction occur? include your lab observations in your answer.

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.

1) a

2)c

3)a

4)c

5)b

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