In the Preceding Example, If Only Group a and Group

question 27

Multiple Choice

In the preceding example, if only Group A and Group D were included as conditions

• A) the effects of both alcohol and number of drinks could be assessed.
• B) the effect of alcohol only could be assessed.
• C) the effect of number of drinks only could be assessed.
• D) alcohol content and number of drinks would be confounded.

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Definitions:

Vertical Zones

The layers or strata of ecosystems, particularly in forests and oceans, characterized by distinct habitats, flora, and fauna.

Euphotic

Relating to the upper layer of a body of water through which sunlight can penetrate and support photosynthesis.

Bathyal

Pertaining to the mid-water or bathypelagic zone in the ocean, typically between 200 and 2,000 meters deep.

Abyssal

Pertaining to the deepest parts of the ocean, typically depths beyond 2,000 meters, characterized by high pressures, low temperatures, and complete darkness.