All heterotrophic bacteria eat organic nitrogen and release ammonia as a byproduct. This process is called (there are two terms for this, either one is correct).

oak trees? ? what was listed

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.