Fsc Part 2 Online Preparation for Biology Chapter No 25 (Ecosystem)

Online Short Questions For Chapter 11 "12th Class Biology Chapter 25 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 25 Short Questions Preparation

Question # 1

Differentiate between secondary and primary succession.

  • Ans 1: Primary succession: Primary succession is the process of succession which starts on a bare rock or dry place where no life exists earlier is called primary succession.
  • Ans 2: Secondary succession: Secondary succession is the process which starts on a place where life exists but sue to some reasons it is destroyed is called secondary succession.
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Prepare Complete Set Wise Questions For Chapter 11 "12th Class Biology Chapter 25 Short Questions Preparation "

12th Class Biology Chapter 25 Short Questions Preparation - Set 1

Question # 1

Differentiate between secondary and primary succession.

  • Ans 1: Primary succession: Primary succession is the process of succession which starts on a bare rock or dry place where no life exists earlier is called primary succession.
  • Ans 2: Secondary succession: Secondary succession is the process which starts on a place where life exists but sue to some reasons it is destroyed is called secondary succession.
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12th Class Biology Chapter 25 Short Questions Preparation - Set 2

Question # 1

Define Succession.Name its types.

  • Ans 1: Succession is a sequence of changes in the community structure of an ecosystem over a period of time.In each case succession is initiated by a few hardy invaders called pioneers ant ends with a diverse and relatively stable climax community.e.g succession start on a bare rock in known as xerosere.
  • Ans 2: i) Primary succession ii) Secondary succession.
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12th Class Biology Chapter 25 Short Questions Preparation - Set 3

Question # 1

Define mutualism. Give example.

  • Ans 1: It is an association in which both members and partners get benefit from each other is called mutualism. For Example: Mycorrhiza. It is an symbiotic association between the roots of higher plants and hyphae of the fungi is called mycorrhiza. Fungus provides nutrient to the plant and in turn itself get carbohydrates from the plant
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12th Class Biology Chapter 25 Short Questions Preparation - Set 4

Question # 1

What do you understand by term trophic level?

  • Ans 1: The level in food chain at which organism feed is called trophic level.There are various trophic levels in the ecosystem e.g producers make first trophic level,herbivores occupy second trophic level and so on.
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12th Class Biology Chapter 25 Short Questions

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