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NCERT Class 12 Biology Chapters
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| 1. |
Forest, grassland and desert are examples of:
(a) Aquatic ecosystem (b) Terrestrial ecosystem
(c) Ecological pyramid (d) Energy flow
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| 2. |
Which of the following is not an example of the terrestrial ecosystem?
(a) Wetland (b) Grassland (c) Forest (d) Desert
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| 3. |
Vertical distribution of different species occupying different levels is called:
(a) Fragmentation (b) Stratification (c) Humification (d) Primary production
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| 4. |
Which of the following equations correctly describes ‘Net primary productivity’?
(a) Net primary productivity = Gross primary productivity + Respiratory loss
(b) Net primary productivity = Gross primary productivity – Respiratory loss
(c) Net primary productivity = Respiratory loss – Gross primary productivity
(d) Net primary productivity = Gross primary productivity – Secondary productivity
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| 5. |
The rate of formation of new organic matter by consumers is termed as:
(a) Tertiary Productivity (b) Gross Primary Productivity
(c) Net Primary Productivity (d) Secondary Productivity
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(CBSE 2019, 2M)
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(CBSE 2019, 2M)
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(CBSE 2020, 3M)
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(b) Explain what does the equation given below show:
NPP = GPP – R
(CBSE 2019, 3M)
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(CBSE 2020, 2M)
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Chapter Name
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Sub Topics
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Ecosystem
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12.1 Introduction
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12.2 Structure of Ecosystem
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12.3 Components of Ecosystem: Biotic and Abiotic Factors
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12.4 Energy Flow in Ecosystem
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12.5 Ecological Pyramids
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12.6 Nutrient Cycling in Ecosystems
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12.7 Types of Ecosystems
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12.8 Primary Productivity in Ecosystems
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