Use humus in a sentence.

Explanation:

1.It is covered with a thick sheet of black earth, a kind of loess, that is mixed with humus.

2.The nitrogen in decaying roots, in the dead stems. and leaves of plants, and in humus generally is sooner or later changed into a nitrate, the change being effected by bacteria.

answer; the correct answer is desert plants;

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.