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Biology

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CBSE Gujarat Board Haryana Board

Previous Year Papers

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Class 10 Class 12

Which one of the following is not used in organic farming?

  • Glomus

  • Earthworm

  • Oscillatoria

  • Snail


D.

Snail

Except for snail, all these are used in organic farming - 

Glomus - Endomycorrhiza
Osscillatoria - BGA
Earthworm - Vermicompost

Except for snail, all these are used in organic farming - 

Glomus - Endomycorrhiza
Osscillatoria - BGA
Earthworm - Vermicompost

347 Views . 9 Shares

In the scrubber in the electrostatic precipitator the gases are passed through :
  • filter
  • lime
  • spray of water
  • both 2 and 3

D.

both 2 and 3
997 Views . 6 Shares

Ozone depletion will cause :
  • Forest fire
  • Pneumonia
  • Increased incidence of skin cancer
  • None of these

C.

Increased incidence of skin cancer
560 Views . 5 Shares

The meaning of BOD is :
  • Bacterial oxygen demand
  • Biological optimum density
  • Biochemical oxygen demand
  • Bioorganisation decay

C.

Biochemical oxygen demand
687 Views . 4 Shares

Which of the following pollutants is not produced by exhaust of motor vehicles ?
  • CO
  • Hydrocarbon
  • Fly-ash
  • NO

C.

Fly-ash
711 Views . 5 Shares

What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
  • myopia
  • snow blindness
  • biomagnification
  • None of the above

B.

snow blindness
695 Views . 11 Shares

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