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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  • Total Questions10

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Biology - 12th Class Biology Chapter 25 Short Questions Preparation

Question # 1

What are lichens and mycorrhiza?

  • Ans 1: Mycorrhiza:It is symbiotic between the roots of higher plants and hyphae of the fungi is called mycorrhiza. Fungus provides nutrient to the plant and in turn it self get carbohydrates from the plant.
  • Ans 2: Lichens:It is the association between algae and fungi.Fungi give protection to algae from desiccation while algae perform photosynthesis and provide nutrition to algae.
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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

What are lichens and mycorrhiza?

  • Ans 1: Mycorrhiza:It is symbiotic between the roots of higher plants and hyphae of the fungi is called mycorrhiza. Fungus provides nutrient to the plant and in turn it self get carbohydrates from the plant.
  • Ans 2: Lichens:It is the association between algae and fungi.Fungi give protection to algae from desiccation while algae perform photosynthesis and provide nutrition to algae.
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12th Class Biology Chapter 25 Short Questions Preparation - Set 2

Question # 1

Differentiate between pioneer and climax community.

  • Ans 1: Pioneer: The first plant which colonizes on a bare land that starts the process of succession are called pioneers.
  • Ans 2: Climax Community: The stable complex community which is formed as a result of succession is called climax community.
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12th Class Biology Chapter 25 Short Questions Preparation - Set 3

Question # 1

What is commensalism?Give an example. Or Define commensalism.

  • Ans 1: In this type of relationship only one organism get benefit from the relationship.The other is not affected at all.For example,Sharks may have small fish called remoras pick the scraps.The remoras get benefit from this relationship the shark is not affected at all.
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12th Class Biology Chapter 25 Short Questions Preparation - Set 4

Question # 1

Write few lines on crustose lichens.

  • Ans 1: Crustose refers to land lifeless structure,any external protective layer surface on the rock,special types of lichens get impregnated in the form of crust.They live in extreme conditions,sometimes their surface is wet due to rain and dew drops.They absord water during the dry season.They are quiescent or dormant,Normally desiccated during dry season.
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12th Class Biology Chapter 25 Short Questions

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