Which one of the following is not used for the construction of ecological pyramids?

1. Dry weight 2. Number of individuals
3. Rate of energy  4. Fresh weight

Subtopic:  Ecological Pyramids |
 70%
From NCERT
AIPMT - 2006
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Which of the following ecological pyramids is generally inverted?

1. Pyramid of biomass in a sea
2. Pyramid of numbers in grassland
3. Pyramid of energy
4. Pyramid of biomass in a forest
Subtopic:  Ecological Pyramids |
 87%
From NCERT
NEET - 2019
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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
AIPMT - 2008
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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
AIPMT - 2010
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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 |
 71%
From NCERT
AIPMT - 2010
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Of the total incident solar radiation, proportion of PAR is:
1.  about 60%
2.  about 50%
3.  more than 80%
4.  about 70%
Subtopic:  Energy Flow |
 89%
From NCERT
AIPMT - 2011
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Mass of living matter at a tropic level in an area at any time is called:
1. Detritus 2. Humus
3. Standing state 4. Standing crop
Subtopic:  Energy Flow | Ecological Pyramids |
 86%
From NCERT
AIPMT - 2011
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Which one of the following statements for a pyramid of energy is incorrect, whereas the remaining three are correct?
1. It shows the 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 |
 89%
From NCERT
AIPMT - 2011
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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 slow pace
4. All of the above

Subtopic:  Ecological Succession (OLD NCERT) |
 64%
From NCERT
AIPMT - 2011
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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:  Components & Types of Ecosystems |
 87%
From NCERT
AIPMT - 2012
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