The urinary system has some of the following roles in the human body: A. Ridding the body of wastes B. Regulation of blood pH C. Regulation of blood pressure D. Stimulate the production of red blood cells E. All of the above are true.

answer; i believe its (ovulation);

as many times as you want

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.