PLANTS
PLANT RESPONSES TO STIMULI
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Growth in response to the direction of water
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Growth in response to the direction of gravity
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The movement or growth of a plant in response to a stimulus may be positive or negative
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Stimulus
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Detailed explanation-1: -Tropism is specific to the direction of the stimulus. Plants can either display a negative or positive movement in response to a stimulus. It is positive tropism when the movement is towards the direction of stimuli while it is negative tropism when the movement is away from the stimuli.
Detailed explanation-2: -Tropism is when a plant moves in response to an external stimulus in the environment. Positive tropism is when a plant moves towards a stimulus. Negative tropism is when a plant moves away from a stimulus.
Detailed explanation-3: -Thigmotropism is an example of tropism and it may be positive or negative. A positive thigmotropism is a response towards the touch stimulus whereas a negative thigmotropism is a response away from the touch stimulus.
Detailed explanation-4: -The movement or growth of any part of a plant in response to an external stimulus is called tropism or tropic movement.
Detailed explanation-5: -Sunlight acts as a stimulus for the growth of organisms towards the light (positive phototropism) or away from light (negative phototropism).