BIOLOGY
HORMONES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ivy twisting around another plant
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A stem bending towards a light source
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A root growing downwards in the soil
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A venus flytrap closing
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Detailed explanation-1: -Some of the most spectacular plant movements are nastic movements. These include the closing of the carnivorous Venus Flytrap leaf when it captures prey or the folding of the mimosa leaf when it is disturbed.
Detailed explanation-2: -The “trap” is made of two hinged lobes at the end of each leaf. 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.
Detailed explanation-3: -The non-growth movement in response to an environmental stimulus is called nastic movement. The venus fly trap shows a response to the stimulus of touch when the insect sits on it by closing its leaves.
Detailed explanation-4: -The closure of the Venus flytrap represents the nonmuscular movement based on hydraulics and mechanical elasticity.
Detailed explanation-5: -The Venus flytrap attracts its prey with a pleasing fruity scent. When an insect lands on a leaf, it stimulates the highly sensitive trigger hairs that line the leaf.