The blastopore is a structure that first becomes evident during
a. fertilization.
b. gastrulation.
c. the eight-cell stage of the embryo.
d. coelom formation.
e. cleavage.
Answer: b. gastrulation
The blastopore is a structure that first becomes evident during
a. fertilization.
b. gastrulation.
c. the eight-cell stage of the embryo.
d. coelom formation.
e. cleavage.
Answer: b. gastrulation