4. In science, most concepts are related to other concepts. Which of the following is most closely related to the Law of Conservation of Mass?
A. when rocks are deposited in layers, the oldest layer is on the bottom
B. pressure from a gas increases as the volume decreases
C. energy can neither be created nor destroyed
D, the force of gravity decreases as distance is increased

C. energy can neither be created nor destroyed

Explanation:

The law of conservation of mass states that in a chemical reaction mass can neither be created nor destroyed. Similarly, the law of conservation of energy states that the amount of energy in an isolated system is conserved ie. the amount of energy can neither be created nor destroyed, but instead changes form.

the answer is "a.) well–developed vascular system."

explanation:

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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