A community and its abiotic environment best define a(an)
1. biogeochemical cycle
2. biosphere
3. ecosystem
4. food web
Subtopic:  Introduction |
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Level 1: 80%+
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Assertion (A): It is convenient to divide the global ecosystem into some basic categories.
Reason (R): Global ecosystem is too big to study at once.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A)
2. Both (A) and (R) are True but (R) is not the correct explanation of (A)
3. (A) is True but (R) is False
4. (A) is False but (R) is True
Subtopic:  Introduction |
 89%
Level 1: 80%+
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A physical structure that is characteristic of each type of ecosystem is due to:

1.  Interaction between various biotic components of the ecosystem
2.  Interaction between various abiotic components of the ecosystem
3.  Interaction between various biotic and abiotic components of the ecosystem
4.   Interaction of producers with abiotic components of the ecosystem

Subtopic:  Introduction |
 88%
Level 1: 80%+
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Which of the following best defines an ecosystem?
1. A group of populations of different species interacting in a specific area, forming a stable unit of life.
2. A large geographic region characterized by specific climatic conditions and dominant plant and animal species.
3. The global ecological system integrating all living organisms and their relationships with the environment.
4. A self-regulating system consisting of biotic and abiotic components that interact with each other through energy flow and nutrient cycling.
Subtopic:  Introduction |
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Level 1: 80%+
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Vertical distribution of different species occupying different levels in a biotic community is known as:-

(1) divergence 

(2) stratification 

(3) zonation 

(4) pyramid

Subtopic:  Introduction |
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Level 1: 80%+
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Which one of the following is not a functional unit of an ecosystem?

1. Energy flow 

2. Decomposition 

3. Productivity 

4. Stratification 

Subtopic:  Introduction | Components & Types of Ecosystems |
 89%
Level 1: 80%+
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Which one of the following is one of the characteristics of a biological community?

1. Stratification 2. Natality
3. Mortality 4. Sex-ratio
Subtopic:  Introduction |
 82%
Level 1: 80%+
AIPMT - 2010
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