Around Day 14 of the Embryonic Period, the _____ Appears

question 53

Multiple Choice

Around day 14 of the embryonic period, the _____ appears. It will eventually become the neural tube.

• A) the stem cells
• B) the spinal cord
• C) the primitive streak
• D) the placenta

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Definitions:

Marginal Social Cost

The cost society bears for production of an additional unit of a good or service, including both private costs and any externalities.

Pollution Reduction

The process or activities aimed at decreasing the amount of pollutants released into the environment, including air, water, and soil.

Total Cost

The aggregate monetary value of all inputs used in the production of goods or services, including fixed and variable costs.

Pollution Permits

Licenses issued by governments that allow the holder to emit a certain amount of pollutants; used as a means to control environmental pollution.