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Embryology: Developmental Stages

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20 Questions

What are the three tissue layers present in bilaterians?

Ectoderm, endoderm, and mesoderm

What is the term for the study of the development of the zygote?

Embryology

What is the stage of development where each cell division produces smaller cells that then form a cavity?

Blastula

Which type of embryonic development is characterized by determinate cleavage?

Protostomes

What is the term for the body cavity found in some animals?

Coelom

Which group of animals is characterized by the presence of a mesoglea?

Cnidarians

What is the term for the process by which the gastrula stage develops into a more complex body structure?

Gastrulation

Which group of animals is characterized by the absence of a gut?

Platyhelminthes

What is the term for the process of cell division that occurs during early embryonic development?

Cleavage

Which type of embryonic development is characterized by indeterminate cleavage?

Deuterostomes

In bilaterians, which tissue layer covers the embryo's surface?

Ectoderm

During cleavage, what is the result of each cell division?

Smaller cells

What is the characteristic of protostome gastrulation?

Gastrulation becomes the mouth

What is the consequence of removing a cell in a protostome embryo?

The cell removed dies

What is a characteristic of deuterostome cleavage?

Indeterminate cleavage

What is the name of the space between the ectoderm and endoderm in cnidarians?

Mesoglea

What is the significance of the coelom in constructing evolutionary trees?

It is often lost in some groups

What is a characteristic of platyhelminthes?

They are acolomate

What is the general term for the three layers present in bilaterian embryos?

Germ layers

What is the term for the study of the development of the fertilized ovum?

Embryology

Test your knowledge of embryology and developmental biology, from fertilization to gastrula. Learn about the stages of development, including cleavage, morula, blastula, and gastrula.

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