Biology Questions Answers

• 1. Among the biotic components of the ecosystem, the producer system is ?

  1. Sea
  2. Rivers
  3. Green Plants
  4. Animals

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 2. Which of has following group of gases contribute to the 'Green House Effect' ?

  1. Carbon tetrafluoride and Nitrous oxide
  2. Carbon monoxide and Sulphur dioxide
  3. Ammonia and Ozone
  4. Carbon dioxide and Methane

  Answer And Explanation

  Answer: Option D

  Explanation:

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• 3. Which one of the following disease is not transmitted by tiger mosquitoes ?

  1. Dengue
  2. Chikungunya
  3. Japanese Encephalitis
  4. Yellow fever

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 4. Which one of the following air pollution can affect blood stream leading to death ?

  1. Cadmium
  2. Asbestos dust
  3. Carbon monodioxide
  4. Lead

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 5. What is Pollination ?

  1. germination of pollen grains
  2. growth of pollen tube in ovule
  3. transfer of pollen from anther to stigma
  4. visiting flowers by insects

  Answer And Explanation

  Answer: Option C

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• 6. Plants receive their nutrients mainly from ?

  1. atmosphere
  2. chlorophyll
  3. light
  4. soil

  Answer And Explanation

  Answer: Option D

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• 7. What is movement of cell against concentration gradient is called

  1. osmosis
  2. active transport
  3. diffusion
  4. passive transport

  Answer And Explanation

  Answer: Option B

  Explanation:

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