ANIMAL PHYSIOLOGY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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response of an organism to seasonal changes in day length.
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directional movement of plant to directional stimulus.
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non-directional movement of plant. The direction is determined by plant
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response of plant to the touching
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Detailed explanation-1: -Final Answer: The directional movement of plants in response to contact is thigmotropism .
Detailed explanation-2: -Chemotropism: The directional movement of plants toward a chemical stimulus is known as chemotropism.
Detailed explanation-3: -Tropisms are directional growth responses to a stimulus. In plants, tropisms can be phototropic in response to light, hydrotropic in response to water, or gravitropic in response to gravity. Shoots and roots respond differently to the stimuli, and this is influenced by the plant growth hormone auxin.
Detailed explanation-4: -A tropism is indeed a turning-a directional response of an organism (usually a plant) to a directional environmental stimulus. The turning may be directed toward the stimulus, in which case it is considered positive tropism, or away from the stimulus – negative tropism.
Detailed explanation-5: -Plant Tropisms 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.