Select the correct sequence of animal developmental events.
A) fertilization cleavage organ formation growth of tissues
B) fertilization cleavage gastrula organ formation
C) fertilization gastrula cleavage organ formation
D) fertilization organ formation gastrula cleavage
E) fertilization organ formation cleavage gastrula

Question

Select the correct sequence of animal developmental events.
A) fertilization >>> cleavage >>> organ formation >>> growth of tissues
B) fertilization >>> cleavage >>> gastrula >>> organ formation
C) fertilization >>> gastrula >>> cleavage >>> organ formation
D) fertilization >>> organ formation >>> gastrula >>> cleavage
E) fertilization >>> organ formation >>> cleavage >>> gastrula

Quizplus · Accepted Answer

The correct sequence of animal developmental events is fertilization, cleavage, gastrula, and organ formation. The formation of the gastrula, which is the formation of the three primary germ layers, is an important developmental milestone that occurs between cleavage and organ formation. Choice A is incorrect because it has the incorrect order of organ formation and growth of tissues. Choice C is incorrect because it has the incorrect order of gastrula and cleavage. Choice D is incorrect because it has the incorrect order of gastrula and cleavage. Choice E is incorrect because it has the incorrect order of cleavage and gastrula.

Select the Correct Sequence of Animal Developmental Events