Question

What is an External Stimulus?Explain geotrophism in plants caused due to it?​

Answer 1

Answer:

Just like phototropism, geotropism is also caused by an unequal distribution of auxin. In a root placed horizontally, the bottom side contains more auxin and grows less - causing the root to grow in the direction of the force of gravity. The opposite happens in a stem.

Answer 2

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Just like phototropism, geotropism is also caused by an unequal distribution of auxin. In a root placed horizontally, the bottom side contains more auxin and grows less - causing the root to grow in the direction of the force of gravity. The opposite happens in a stem