Question

the root system grows upwards in response to geotropism or phototropism​

Answer 1

Stem response to light is positive phototropism (grows towards the light). Root response to gravity is positive geotropism (grows in the direction of the force of gravity).

Answer 2

Answer:

Geotropism comes from two words, “geo” which means earth or ground and “tropism” which means a plant movement triggered by a stimulus. In this case, the stimulus is gravity. Upward growth of plant parts, against gravity, is called negative geotropism, and downward growth of roots is called positive geotropism

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