PLANTS
PLANT RESPONSES TO STIMULI
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gravity
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Light
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Temperature
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All of the above
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Detailed explanation-1: -Geotropism is a type of tropism where plants show some growth in response to gravity. Roots growing downwards is an example of geotropism.
Detailed explanation-2: -Roots grow downward, or towards the center of Earth, and away from light. These responses to external stimuli are called tropisms. Plants’ growth response to gravity is known as gravitropism; the growth response to light is phototropism. Both tropisms are controlled by plant growth hormones.
Detailed explanation-3: -Scientists have long speculated that plants bend in response to gravity due to the redistribution of the plant hormone auxin in the tip of the root.
Detailed explanation-4: -Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant in response to gravity pulling on it.