Newton's law of universal gravitation . A. Explains why an object falls to the ground when it is dropped B. Is an observation Sir Isaac Newton made in 1687 C. Allows us to calculate how two objects will attract each other D. Is actually a theory that has been incorrectly named

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed