In what way can dna segments be changed such that genes are altered or mutated? i. new dna segments can be inserted. ii. new dna segments can be substituted. iii. dna segments can be deleted.

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