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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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%
From NCERT
NEET - 2010
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The correct sequence of plants in a hyrdosere is 

1. Oak→Lantana →Scirpus→Pistia→Hydrilla→Volvax
2. Volvax→Hydrilla→Pistia→Scirpus→Lantana→Oak
3. Pistia→Volvax→Scirpus→Hydrilla→Oak→Lantana
4. Oak →Lantana→Volvax→Hydrilla→Pistia→Scirpus

Subtopic:  Components & Types of Ecosystems | Ecological Flow |
 69%
NEET - 2009
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Which one of the following types of organisms occupy more than one tropic level in a

pond ecosystem?

1. Phytoplankton       

2. Fish

3. Zooplankton         

4. Frog

 

Subtopic:  Energy Flow |
 54%
NEET - 2009
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About 70% of total global carbon is found in

1. grasslands

2. agro-ecosystems

3. oceans

4. forests

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 83%
From NCERT
NEET - 2008
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