The carbohydrates seen here contain three common elements. They are A) carbon, hydrogen, and oxygen.
B) oxygen, nitrogen, and sulfur.
C) hydrogen, oxygen, and nitrogen.
D) carbon dioxide, hydrogen, and phosphorus.

preservation because he preserves part of the land and preserves means save

explanation:

c

explanation:

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.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.