(a) What does a stem (or shoot) do in response to gravity ? What is this phenomenon known as ?(b) What does a root do in response to light ? What is this phenomenon known as ?

(a) In response to gravity the stem of a plant grows upwards and away from the gravitational pull. This phenomenon is known as negative geotropism.

(b) In response to light the root of a plant always grow downwards and away from the light. This phenomenon is known as negative phototropism.

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Updated on: 24-Mar-2023

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