Tag: bio-geo chemical cycles in nature

Questions Related to bio-geo chemical cycles in nature

The bacteria ______ supply natural manure to paddy fields.

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Azolla

  2. Anabaena

  3. Azotobacter

  4. Nostoc

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Correct Option: A
Explanation:
The bacteria Azolla supplies natural manure to the paddy fields. Azolla is a gliding pteridophyte, which contains as endosymbiont the nitrogen-settling cyanobacterium Anabaena azollae (Nostocaceae family). 
Generally developed in the Asian districts, Azolla is either consolidated into the dirt before rice transplanting or developed as a double product alongside rice. 
So, the correct answer is A.

True or False:
Burning of fossil fuels liberate oxygen.

evs bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. True

  2. False

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Correct Option: A

Which gas is likely to be reduced in the atmosphere by deforestation?

evs bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Carbon dioxide

  2. Nitrogen

  3. Oxygen

  4. Sulphur dioxide

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Correct Option: C

The ozone at ground level is primarily from__________ precursors

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Fossil fuel

  2. $CFC _{S}$

  3. Oxygen

  4. Methane

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Correct Option: A

Phosphorous, is needed for the

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Growth

  2. Decomposition

  3. Photosynthesis

  4. Eutrophication

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Correct Option: C

Which chemical was used as a foam blowing agents?

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Cl

  2. CFCs

  3. PAN

  4. Feron 11

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Correct Option: B

What is concentration of $O _{2}$ in atmosphere?

evs bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. 12%

  2. 20.90%

  3. 21%

  4. 22%

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Correct Option: B

What does 'Aluminum' irritate?

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Brook trout's gills

  2. Shark's gills

  3. Zooplankton's gills

  4. Phytoplankton's gills

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Correct Option: A

In ocean, carbon is usually in form of:

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Bicarbonates ions

  2. Carbon dioxide

  3. Calcium

  4. Phosphorous

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Correct Option: A

Emission of $CO$ and $NO _{2}$ are responsible for higher concentration of $O _{3}$ in

zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

  1. Stratosphere

  2. Troposphere

  3. Thermosphere

  4. Biosphere

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Correct Option: B