Structural and functional unit of biosphere is Ecosystem, Biologically more fertile of Subsere

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Free Online Mock Biology Multiple Choice Test on Organism and Environment

Sub Category : Organism and Environment	Test : 8	Time Left :
1.Time-span of a Prisere is
(1) 100-200 years (2) 50-100 years (3) 1000 years or more (4) 150 years.
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2.Which of the following regions are secondarily based?
(1) Igneous rocks (2) Sand dunes (3) Newly exposed sea floor (4) Forest fire area.
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3.Which of these is biologically more fertile?
(1) Prisere (2) Subsere (3) (1) + (2) (4) None.
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4.Invasion by weeds affects?
(1) Biotic succession (2) Crop yield (3) (1) + (2) (4) None.
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5.Structural and functional unit of biosphere is?
(1) Niche (2) Ecosystem (3) Population (4) (1) + (2) + (3).

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Free Online Mock Biology Multiple Choice Test on Organism and Environment