Exposure to light and gravity will cause a root to grow downward into the soil.

Name: Exposure to light and gravity will cause a root to grow downward into the soil.
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Quizplus · Accepted Answer

The root's response to light and gravity is called gravitropism or geotropism, which causes the root to grow downward (or towards the source of gravity) and away from the light. This helps the root to anchor the plant and absorb water and nutrients from the soil.

Exposure to Light and Gravity Will Cause a Root to Grow