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

(a) In response to gravity the roots of a plant always grow downwards. This phenomenon is known as geotropism.

(b) In response to light the stem of a plant grows upwards. This phenomenon is known as phototropism.

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Updated on: 24-Mar-2023

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