Tag: food material and source

Questions Related to food material and source

'Baking soda' and 'lime' has

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Low pH

  2. High pH

  3. Medium PH

  4. No PH

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Correct Option: B

The dead and decaying materials when decomposed by microorganism forms

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Humus

  2. Fertilizer

  3. Loamy soil

  4. None of the above

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Correct Option: A

Increase in the microorganism of soil increases the formation of 

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Humus

  2. Clay

  3. Rocks

  4. None of the above

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Correct Option: A

Which of the following can act as decomposers?

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Lion

  2. Tiger

  3. Monkey

  4. Fungi

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Correct Option: D

Humus can increase the 

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Soil fertility

  2. Water table

  3. Minerals

  4. None of the above

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Correct Option: A

The decomposers in the forest perform 

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Production of the plants

  2. Decomposition of the plants and animals

  3. Breakdown of the forests

  4. All of the above

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Correct Option: B
Explanation:

Decomposers are saprotrophs, which decompose the organic remains of plants and animals by secreting extracellular digestive enzymes. Due to degradation of organic remains, decomposers are also called reducers. Heterotrophic bacteria and saprophytic fungi are the important organisms which usually act as decomposers. Thus, the correct answer is option B.

Assertion : Interspecific hybridization often fails to form normal embryos.

Reason : Such embryos can germinate in culture conditions.

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. If both assertion and reason are true and the reason is the correct explanation of the assertion.

  2. If both assertion and reason are true but reason is not the correct explanation of the assertion.

  3. If assertion is true but reason is false.

  4. If the assertion and reason both are false.

  5. If assertion is false but reason is true.

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Correct Option: B
Assertion:Methyl mercury highly persistent kind of pollutant that accumulates in food chain 
Reason: Mercury pollution is responsible for Minamata disease
evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

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Correct Option: B

In grazer food chain the living plants are directly

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. destroyed

  2. consumed

  3. decayed

  4. grown

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Correct Option: B

Which among the following always decreases in a Food chain across tropic levels?

evs forests: our lifeline food material and source sources of food and food habits of animals seed dispersal

  1. Number

  2. Accumulated chemicals

  3. Energy

  4. None of the above

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Correct Option: C