An adequate sample of a population for studies of natural selection should
be large enough to:
O
A. justify the cost of the food needed for the study.
O
B. allow for a large number of observations.
O
C. include more than half of the entire population.
D. represent the genetic variation in the population.
SUBMIT

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