Electrochemical and photochemical fixation of nitrogen is 35 mg per year, Net 1degree peoductivity is Gross production

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Free Online Mock Biology Multiple Choice Test on Biosphere

Sub Category : Biosphere	Test : 4	Time Left :
1.Earth is ..... of solar system
(1) 1/8 (2) 1/4 (3) 1/6 (4) 1/3 (5) 1/2
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2.Amount of C fixed by photosynthesis is nearly
(1) 7Ã-10power13 kg per year (2) 7Ã-10power19 kg per year (3) 10Ã-01power10 kg per year (4) 10Ã-10power20 kg per year
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3.Electrochemical and photochemical fixation of nitrogen is
(1) 20 mg per year (2) 170 mg per year (3) 35 mg per year (4) 100 mg per year
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4.Net 1degree peoductivity is ?
(1) Gross production + respiration (2) Gross production - respiration (3) Gross production Ã- respiration (4) Gross production / respiration
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5.Which of the following is a (-) ve interaction?
(1) Amensalism (2) Parasitism (3) Competition (4) All of the above

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Free Online Mock Biology Multiple Choice Test on Biosphere