Question

What controls a tropism?

Answer 1

Answer: It is controlled by the sun. It grows like a normal plant does. A plant grows towards the sun.

Explanation: Plants always grow towards the sun unless somehow they die. The sun controls them.

Answer 2

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.

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