Scelta multipla
Which of the following processes occurs in the nucleus during cell division?
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11. Cell Division
Introduction to Cell Division
Scelta multipla
At what stage of embryogenesis do the three germ layers (ectoderm, mesoderm, and endoderm) form?
A
Cleavage
B
Neurulation
C
Gastrulation
D
Fertilization
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Understand the process of embryogenesis, which is the development of an embryo from a fertilized egg. It involves several stages: fertilization, cleavage, gastrulation, and neurulation.
Recall that gastrulation is a critical stage in embryogenesis where the single-layered blastula reorganizes into a multilayered structure called the gastrula.
Learn that during gastrulation, the three germ layers—ectoderm, mesoderm, and endoderm—are formed. These layers will later differentiate into various tissues and organs in the body.
Differentiate between the stages: Cleavage involves rapid cell division without growth, fertilization is the union of sperm and egg, and neurulation occurs after gastrulation to form the neural tube.
Conclude that the formation of the three germ layers occurs specifically during gastrulation, making it the correct answer to the question.
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