Question

Do plants respond to stimuli like animals?

Answer 1

Like all organisms, plants detect and respond to stimuli in their environment Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism. Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin

Answer 2

Dear Student,

◆ Answer -

Yes. Plants respond to stimuli like animals.

● Explaination -

• Plants respond to various stimuli in environment such as - gravity, water source, temperature, light, etc.
• Responses by plants are of two types - tropism (permanent growth) or nastic movements (irreversible).
• Roots grow towards centre of earth, this is called geotropism.
• Stems grow towards light, this is called phototropism.
• Petals of lotus open during day and close during night, this is photonasty.

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