An Ecologist Conducts a Greenhouse Experiment to Study the Effect

question 17

Multiple Choice

An ecologist conducts a greenhouse experiment to study the effect of nitrogen concentration on the productivity of sunflower seedlings.What is the independent variable in this experiment?

• A)productivity of sunflowers
• B)concentration of nitrogen
• C)the number of sunflower seeds planted
• D)the daily amount of water given to each sunflower seed

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Definitions:

Differential Carrier Oil

A type of lubricant used in the differential of a vehicle to reduce friction and protect the gears.

Operating Temperature

The range of temperature within which a mechanical or electronic device is designed to function efficiently and safely.

Ambient Temperature

The temperature of the surrounding air or environment where a device or system operates.

Pinion Gear

A small gear that engages with a larger gear or rack, transferring motion and force in mechanical systems such as steering mechanisms.