What Is the Feature That First Signals Gastrulation

question 3

Multiple Choice

What is the feature that first signals gastrulation?

• A)Invagination of cells from the epiblast occurs.
• B)Folding of the embryonic disc occurs.
• C)The yolk sac disappears.
• D)The embryonic disc forms.
• E)The primitive streak forms.

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Definitions:

Internal Causes

Reasons or factors within an organization or individual that lead to a specific effect or outcome, contrasting with external influences.

External Causes

Factors or circumstances outside of one's control that influence events or outcomes.

Perceivers

Individuals who interpret, process, and assign meaning to information and stimuli they receive from the environment.

Behavior

The behavior or responses of a person in reaction to outside or inside triggers.