Determinate cleavage takes place in ____ and is characterized by a pattern of development where the ultimate fate of each cell is _____.
a. protostomes; not fixed until late in the developmental process
b. protostomes; fixed early in the developmental process
c. deuterostomes; not fixed until late in the developmental process
d. deuterostomes; fixed early in the developmental process
e. coelomates; fixed early in the developmental process