It penetrates the skin and can cause mutations.
The correct answer is "ovulation" and "corpus luteum" respectively. In ovulation, the egg ruptures from the mature follicle (called the Graafian follicle). This process is preceded by the sudden rise in luteinizing hormone. The follicle now becomes the corpus luteum, actually does not secrete estrogen, it secretes progresterone which prepares the uterine lining for pregnancy.
False teeth help the digestive system by chewing pieces of food into smaller pieces but it is not part of it.
<span />
All of them. Forests are considered natrual enviornment and people/buildings are man-made environment
sorry for bad spelling
