science
Grade-4-
Easy

Question

Plants growing towards the source of light is also known as:

  1. Phototropism
  2. Photosynthesis
  3. Geotropism
  4. Hydrotropism 

hintHint:

Recall the another word for light used.

The correct answer is: Phototropism


    The correct option is a)Phototropism.
    Phototropism can be defined as the response of plant towards light. Plant cells furthest from light contain hormones called auxins that react when phototropism occurs. This causes plants to have elongated cells on the side furthest from light. Phototropism is one of many plant tropisms, and the movements in response to external stimuli. Growing towards the light source is called positive phototropism and growing away from the light is called negative phototropism.

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