Spreading of Opuntia in India was controlled by introducing insects, Polluted lake, index of pollution is daphnia

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Free Online Mock Biology Multiple Choice Test on Organism and Environment

Sub Category : Organism and Environment	Test : 10	Time Left :
1.One of the effect of dust is to cause
(1) Opening of stomata (2) Closure of stomata (3) Coiling of leaves (4) Yellowing of leaves
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2.Spreading of Opuntia in India was controlled by
(1) Sitting loose rattles to consume them (2) Encourage birds to effectively disperse their seeds (3) Spraying harmones (4) Introducing insects
1 2 3 4
3.The component of a living cell affected by the pollutant SO2 is
(1) Nucelus (2) All cell membrane system (3) Cell wall (4) Plasmodesmata
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4.Acid rain rich in sulphuric and nitric acid has resulted in dealth of almost all the fishes in lakes of?
(1) Canada (2) U.S.A (3) Scandinavia (4) All the above
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5.In polluted lake, index of pollution is?
(1) Frog (2) Daphnia (3) Lichen (4) Artemia

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Free Online Mock Biology Multiple Choice Test on Organism and Environment