The Oval,three-Layered Sheet Produced by Gastrulation Is Called the

question 126

Multiple Choice

The oval,three-layered sheet produced by gastrulation is called the

• A)embryo.
• B)ectoderm.
• C)inner cell mass.
• D)embryonic disc.
• E)yolk sac.

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Definitions:

Research

The systematic investigation into and study of materials, sources, etc., in order to establish facts and reach new conclusions.

Placebo Effect

A beneficial effect produced by a placebo drug or treatment, which cannot be attributed to the properties of the placebo itself, and must therefore be due to the patient's belief in the treatment.

Naturalistic Observation

A research method in which subjects are observed in their natural environment without any manipulation by the observer.

Field

A specific area of study or professional practice within a broader discipline, characterized by a unique set of theories, research methods, and applications.