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Chapters
1: Sexual Reproduction in Flowering Plants
2: Human Reproduction
3: Reproductive Health
UNIT VII : GENETICS AND EVOLUTION
4: Principles of Inheritance and Variation
5: Molecular Basis of Inheritance
6: Evolution
UNIT VIII : BIOLOGY IN HUMAN WELFARE
7: Human Health and Disease
8: Microbes in Human Welfare
UNIT IX : BIOTECHNOLOGY
9: Biotechnology : Principles and Processes
10: Biotechnology and its Applications
UNIT X : ECOLOGY
11: Organisms and Populations
▶ 12: Ecosystem
13: Biodiversity and Conservation
![NCERT solutions for Biology [English] Class 12 chapter 12 - Ecosystem - Shaalaa.com](/images/biology-english-class-12_6:b1f8befaad564f848198c61748124f91.jpg "NCERT solutions for Biology [English] Class 12 chapter 12 - Ecosystem")
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Solutions for Chapter 12: Ecosystem
Below listed, you can find solutions for Chapter 12 of CBSE, Karnataka Board PUC NCERT for Biology [English] Class 12.
NCERT solutions for Biology [English] Class 12 12 Ecosystem EXERCISES [Pages 214 - 215]
Fill in the blanks.
Plants are called as _________ because they fix carbon dioxide.
In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type.
In aquatic ecosystems, the limiting factor for the productivity is _________.
Common detritivores in our ecosystem are _________.
The major reservoir of carbon on earth is _________.
Which one of the following has the largest population in a food chain?
Producers
Primary consumers
Secondary consumers
Decomposers
The second trophic level in a lake is-
Phytoplankton
Zooplankton
Benthos
Fishes
Secondary producers are
Herbivores
Producers
Carnivores
None of the above
What is the percentage of photosynthetically active radiation (PAR), in the incident solar radiation?
100%
50%
1-5%
2-10%
Distinguish between Grazing food chain and detritus food chain.
Distinguish between Production and decomposition.
Distinguish between Upright and inverted pyramid.
Distinguish between food chain and food web.
Distinguish between Litter and detritus.
Distinguish between primary and secondary productivity.
Describe the components of an ecosystem.
Define ecological pyramids.
Describe with examples of pyramids of number, and biomass.
What is primary productivity?
Give a brief description of the factors that affect primary productivity.
Define decomposition.
Describe the processes and products of decomposition.
Give an account of energy flow in an ecosystem.
Solutions for 12: Ecosystem
NCERT solutions for Biology [English] Class 12 chapter 12 - Ecosystem
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Concepts covered in Biology [English] Class 12 chapter 12 Ecosystem are Ecosystems Patterns, Ecosystem - Structure and Function, Productivity, Ecological Pyramids, Nutrient Cycles, Ecological Succession, Ecosystem Services, Concept of Energy Flow in an Ecosystem, Introduction and Types of Ecosystem, Ecosystem, Decomposition, Ecosystems Patterns, Ecosystem - Structure and Function, Productivity, Ecological Pyramids, Nutrient Cycles, Ecological Succession, Ecosystem Services, Concept of Energy Flow in an Ecosystem, Introduction and Types of Ecosystem, Ecosystem, Decomposition.
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