Which correctly describes a difference between the male and female
reproductive systems? a. only females produce gametes
b. males have a monthly cycle.
c. only males are fertile.
d. females produce gametes less often.

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