Just Prior to the Onset of Gastrulation in an Embryo

question 18

Multiple Choice

Just prior to the onset of gastrulation in an embryo, the "organizer" cells are specified. If you were to experimentally block the specification of these cells, what would you expect the result to be in the developing embryo?

• A) There would be no effect on development.
• B) Gastrulation would not occur, and normal development would cease.
• C) The body axes would develop normally, but the embryo would not grow appendages.
• D) The embryo would not develop an intestine, but all other organs and tissues would develop normally.

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Definitions:

Parental Discipline

Strategies and methods used by parents to teach and guide their children's behavior towards acceptable social norms.

Relational Aggression

A type of aggression that harms others through deliberate manipulation or damage to their relationships or social status.

Conduct Disorder

A range of antisocial types of behavior displayed in childhood or adolescence, characterized by aggression toward people and animals, destruction of property, deceitfulness, theft, and serious violations of rules.

Oppositional Defiant Disorder

A mental health disorder diagnosed in children and adolescents characterized by a persistent pattern of defiant, disobedient, and hostile behavior towards authority figures.