Answer: The hormones controlling the female reproductive system include gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone (FSH) and leutenizing hormone (LH), all of which are produced in the brain; oestrogen and progesterone produced by the ovaries and the corpus luteum; and human chorionic gonadotropin (HCG
A situation where friction would be desirable is rubbing your hands together to make them warm in the winter time.
Homogeneous is the answer
Methane the most, small amount of oxygen and other gases
All cells come from pre-existing cells
