Select the correct sequence of animal developmental events.
A) fertilization cleavage gastrulation morula
B) fertilization cleavage morula gastrulation
C) cleavage morula gastrulation fertilization
D) morula fertilization gastrulation cleavage
E) fertilization morula gastrulation cleavage

Question

Select the correct sequence of animal developmental events.
A) fertilization >>> cleavage >>> gastrulation >>> morula
B) fertilization >>> cleavage >>> morula >>> gastrulation
C) cleavage >>> morula >>> gastrulation >>> fertilization
D) morula >>> fertilization >>> gastrulation >>> cleavage
E) fertilization >>> morula >>> gastrulation >>> cleavage

Quizplus · Accepted Answer

The correct sequence is fertilization, cleavage, morula, and then gastrulation. Fertilization is the union of sperm and egg, cleavage is the series of rapid cell divisions, morula is the solid ball of cells, and gastrulation is the formation of germ layers.

Select the Correct Sequence of Animal Developmental Events