EMBRYOLOGY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Animals do not have hairs that can sense things.
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Most animals do not use their sense of touch to catch food.
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The Venus flytrap does not have a brain to process the information.
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Animals also use sensory hairs to taste the food but the Venus flytrap does not.
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Detailed explanation-1: -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-2: -The carnivorous Venus flytrap catches prey by an ingenious snapping mechanism. Based on work over nearly 200 years, it has become generally accepted that two touches of the trap’s sensory hairs within 30 s, each one generating an action potential, are required to trigger closure of the trap.
Detailed explanation-3: -The Venus fly trap is one of the few carnivorous plants that is able to move. The Venus fly trap has two leaves that are hinged at the base. Each leaf has small hairs on the surface that trigger the plant to close when they are touched.