why do roots always grow downwards?

Asked by manoj255 | 8th Feb, 2010, 10:12: AM

Expert Answer:

Plant roots are positively geotropic and negatively phototropic. Hence they will avoid light and grow towards gravity into the soil. Also, the plant roots grow down to find water and minerals.

Answered by  | 9th Feb, 2010, 07:27: AM

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