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: -Thigmonasty or seismonasty is the nastic response of a plant or fungus to touch or vibration. Conspicuous examples of thigmonasty include many species in the leguminous subfamily Mimosoideae, active carnivorous plants such as Dionaea and a wide range of pollination mechanisms.
Detailed explanation-2: -Key Points. When subjected to constant directional pressure, such as a trellis, plants move to grow around the object providing the pressure; this process is known as thigmotropism. Thigmonastic responses include opening and closing leaves, petals, or other parts of the plant as a reaction to touch.
Detailed explanation-3: -The phenomenon of changing position in response to external stimuli such as light or touch is known as thigmonastic movement. Thigmonastic movement is shown by some plants and fungi in response to touch.
Detailed explanation-4: -An example of thigmotropism is the coiling movement of tendrils in the direction of an object that it touches. On the other hand, the folding movement of the Mimosa pudica leaflets, can be considered as an example of thigmonastism.
Detailed explanation-5: -On the inner surfaces of the lobes are hair-like projections called trichomes that cause the lobes to snap shut when prey comes in contact with them. This type of movement is called thigmonasty-a nondirectional plant response to being touched.