According to this diagram, the result of spermatogenesis is four sperm cells, each with

the correct answer is b

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. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint