Which experimental procedure would provide the best evidence for the effect of light on plant growth?(1 point)

Question

Responses

Measure plants of the same variety grown in environments that receive different amounts of light.
Measure plants of the same variety grown in environments that receive different amounts of light.

Plant seeds in different soils and expose them to different amounts of light, then measure plant growth.
Plant seeds in different soils and expose them to different amounts of light, then measure plant growth.

Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.

Measure plants receiving different amounts of light in their natural environments.

Answer 1

The best experimental procedure to provide evidence for the effect of light on plant growth is:

Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.

This approach controls for other variables, ensuring that light is the only factor being manipulated, allowing for a clear understanding of its effect on plant growth.