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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