Which statement is correct about neutrons? has no charge and about the same mass as an electron
has a negative charge and much less mass than a proton
has a positive charge and the same mass as a proton
has no charge and the same mass as a proton

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