Growth in response to a stimulus is called a tropism.

Plants growing towards the light are displaying negative tropisms.

Positive tropisms is when plants grow away from the stimulus.

_________ tropisms respond to gravity.

Roots undertake ___________ tropisms because they grow downward in the soil.

Roots undertake positive geo tropisms because they grow downward in the soil.

Geotropisms respond to gravity.

Roots undertake negative photo tropisms because they grow downward in the soil.

Negative tropisms are when growth is away from the stimulus.

Growth in response to light

Stems are

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