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Botany MCQs for NEET — Practice Questions with Answers

Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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Which is worldâ€™s most problematic aquatic weed?

A. Chara B. Wulffia C. Hydrilla D. Eichhornia

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What is biological magnification of DDT in large size fish eating birds?

A. 25ppb B. 25ppm C. 2.5ppm D. 0.25ppm

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The population of eagles and hawks is declining because of,

Food scarcity

game lovers

Harmful effects of pesticides

Very few dead animals are found in fields

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Explanation

Using of pesticides causes thinning of egg shells of birds which leads to decline in population of birds

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Thinning of eggshell and their premature breaking is due to

A. Eutrophication B. Globalwarming C. Green house effect D. Biological magnification

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Aging of lake is accelerated by

A. Cultural Eutrophication B. Biological magnification C. Biological accumulation D. Algal bloom

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Which chemicals increase growth of aquatic organism?

A. Nitrogen and phosphorus B. Calcium and iron C. Nitrogen and calcium D. Nitrogen and iron

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Arrange the following statements with reference to accelerated eutrophication inproper manner. P. Silt and debris pile up at the bottom of the lake Q. Marsh plants take roots in the shallows begin to fill the lake basin R. Introduction of large number of nitrogen and phosphate in the pond S. Encouragement of growth of aquatic organisms.

A. P,Q,R,S B. R,S,Q,P C. R,S,P,Q D. S,R,P,Q

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Increase in the concentration of a nonbiodegradable substance of various tropic level is called

A. Eutrophication B. Global warming C. Biological bloom D. Biological magnification

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Deforestation results in

A. Change in climatic condition B. Reduce rain fall C. Loss of biodiversity D. All of these

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Biological treatment of water pollution can be done by

A. Lichens B. Phytoplankton C. Algae D. None of these

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