Question #1 Insulin is only made by the B-cells in the pancreas. Which statement best explains why? (a) B-cells are the only cells that express the insulin gene. (b) B-cells attack any other cells that express the insulin gene. (c) B-cells secrete proteins that stop other cells from expressing the insulin gene. (d) B-cells have the gene to make insulin, but no other cell has it.

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