Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

1. Oxygen cycle

2. Phosphorus cycle

3. Nitrogen cycle

4. Carbon cycle

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 80%
From NCERT
NEET - 2012
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Identify the possible link A in the following food chain

Green plant -> Insect -> Frog -> A -> Eagle

1. rabbit                         

2. wolf

3. cobra                         

4. parrot

Subtopic:  Components & Types of Ecosystems | Energy Flow |
 89%
NEET - 2012
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Given below is an imaginary pyramid of numbers. What could be one of the possibilities

about certain organisms at some of the different levels?

1. Level PC is insects and level SC is small insectivorous birds.

2. Level PP is phytoplanktons in sea and whale on top level TC

3. level one PP is pipal trees and the level SC is sheep

4. Level PC is rats and level SC is cats 

Subtopic:  Ecological Pyramids |
 50%
NEET - 2012
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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 |
 85%
From NCERT
NEET - 2012
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The upright pyramid of number is absent in

1. pond                           

2. forest

3. lake                           

4. grassland

Subtopic:  Ecological Pyramids |
NEET - 2012
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Which one of the following statements is correct for secondary succession?

1. It occurs on a deforested site 

2. It follows primary succession

3. It is similar to primary succession except that it has a relatively fast pace

4. It begins on a bare rock

Subtopic:  Ecological Succession (OLD NCERT) |
 69%
From NCERT
NEET - 2011
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Which one of the following statements for pyramid of energy is incorrect, whereas the

remaining three are correct ?

1. It shows energy content of different trophic level organisms

2. It is inverted in shape

3. It is upright in shape

4. Its base is broad

Subtopic:  Ecological Pyramids |
 88%
From NCERT
NEET - 2011
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Mass of living matter at a trophic level in an area at any time is called 

1. Detritus

2. Humus

3. Standing state 

4. Standing crop

Subtopic:  Energy Flow | Ecological Pyramids |
 84%
From NCERT
NEET - 2011
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Of the total incident solar radiation the proportion of PAR is 

1. about 60%

2. less than 50%

3. more than 80%

4. about 70%

Subtopic:  Energy Flow |
 90%
From NCERT
NEET - 2011
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The biomass available for consumption by the herbivores and the decomposers is called

1. net primary productivity

2. secondary productivity

3. standing crop

4. gross primary productivity

Subtopic:  Ecosystem Productivity |
 70%
From NCERT
NEET - 2010
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