The Gray Crescent in a Frog Zygote

question 104

Multiple Choice

The gray crescent in a frog zygote

• A) marks the site of important developmental events.
• B) develops at the site of sperm entry.
• C) causes rotation of the cortical cytoplasm.
• D) does not change in position from its location in the unfertilized egg.
• E) results from rotation of the heavily pigmented inner cytoplasm relative to the less pigmented cortical cytoplasm.

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Definitions:

Market Structure

The organizational and other characteristics of a market, including the nature of competition and the degree of market concentration.

Perfect Competition

A market structure characterized by a large number of buyers and sellers, identical products, free entry and exit, and perfect information, leading to efficient outcomes.

Monopoly

A market structure characterized by a single seller who has exclusive control over the supply of a good or service, and where entry of new competitors is obstructed.

Compensating Wage Differential

Additional wages paid to workers to compensate them for undesirable job characteristics, such as poor working conditions or long hours.