The number of possible genetically different gametes for an organism equals 2n, where n is the number of pairs of chromosomes. if an organism has four pairs of chromosomes, how many different gametes can it produce?
a. 4
b. 8
c. 32
d. 16

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

Do fish feel pain? and if they do what pain

Which does not describe a physical change happening to water? water evaporating in the sun water reacting with nitrogen gas water freezing and being broken apart with a knife water heating up on a stove