Which Statement About Animal Development Is True

question 227

Multiple Choice

Which statement about animal development is true?

• A) Differentiation of cells into different cell types involves signaling molecules.
• B) In frog embryos, β-catenin is necessary but not sufficient for the formation of the primary embryonic organizer.
• C) Blastomeres are early embryonic cells that form during gastrulation.
• D) The mouth of the sea urchin forms from the blastopore.
• E) Cells migrate during the blastula stage.

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Definitions:

Probability Calculus

A field of mathematics focused on determining the probability of different results.

Disjunction

Disjunction is a logical operation that results in true if at least one of the operands is true; in propositional logic, it's represented by the OR operator.

Event

An occurrence or happening, especially one of significance, that can be observed or participated in.

Dependent

Relies on or is determined by another object, condition, or factor.