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Question

An example of fresh water, rootless insectivorous plant is

A
Drosera
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B
Dionaea
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C
Dinoflaggelata
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D
Myriophyllum
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Solution

The correct option is A Dionaea
Dionaea is an example of fresh water, rootless insectivorous plant. Dionaea, is a carnivorous plant native to subtropical wetlands. It catches its prey, chiefly insects and arachnids, with a trapping structure formed by the terminal portion of each of the plant's leaves and is triggered by tiny hairs on their inner surfaces. When an insect or spider crawling along the leaves contacts a hair, the trap closes if a different hair is contacted within twenty seconds of the first strike. The requirement of redundant triggering in this mechanism serves as a safeguard against a waste of energy in trapping objects with no nutritional value.

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