What Are Three Types of Tropism?

Answer

There are many more than three types of tropism in the plant world. Tropism comes from the Greek word meaning 'to turn.' Tropes are classified and named for the reasons plants turn. They turn to get more light, as in Phototropism. They turn with and against gravity, as in Gravitropism. They turn toward water, which is called Hydrotropism. They also turn in response to touch, and this is called Thigmotropism.
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