The Inner Cells of the Blastocyst Separate into Three Layers

question 109

Multiple Choice

The inner cells of the blastocyst separate into three layers.These three layers become the

• A)placenta.
• B)embryo.
• C)amniotic sac.
• D)umbilical cord.

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Definitions:

Flu Vaccines

Vaccines that protect against influenza, a contagious respiratory illness caused by influenza viruses.

Marginal Social Benefits

The extra advantage obtained by society from the consumption of an additional unit of any product or service.

Positive Externalities

Benefits that are enjoyed by third-parties as a result of an economic transaction or activity, without them directly participating in the transaction.

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A tax imposed on activities that generate negative externalities, aimed at correcting an inefficient market outcome.