Why do roots grow towards the soil? Explain with three points.
inhibitors in plants
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1. Because of gravitational force.
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Answer:
The growth of the root towards the soil is a graviotropic or hydrotropic movement.
They grow in soil because of :-
•in search of water and minerals.
•to hold the soil tightly.
•to support the stem for aerial projection of branches and leaves such that it would get optimum air and light for performing their several vital activities like photosynthesis,respiration, transpiration etc.
Several hormones like auxins, ethylene, and cytokines play role in growth of root.
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