Mr Z is building a greenhouse at his house to protect his plants from all the bugs that live in his garden. He is at Bunnings purchasing his materials and can’t decide whether to construct his greenhouse out of glass or tin. What information does he need to know to help him with this decision?

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