A 250 g blo k is dropped onto a relaxed
verti
al spring that has a spring
onstant of k = 2.5 N/cm. The blo
k
be
omes atta
hed to the spring and
ompresses the spring 12 cm before
momentarily stopping

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