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Q. No.

The upright pyramid of number is absent in:

1. Pond

2. Forest

3. Lake

4. Grassland

Subtopic:  Ecological Pyramids |
Level 3: 35%-60%
AIPMT - 2012
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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 |
 90%
Level 1: 80%+
AIPMT - 2011
Hints
Large woody vines are more commonly found in:

1.  mangroves

2.  tropical rainforests

3.  alpine forests

4.  temperate forests

Subtopic:  Components & Types of Ecosystems |
 71%
Level 2: 60%+
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 |
 87%
Level 1: 80%+
AIPMT - 2011
Hints
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 |
 90%
Level 1: 80%+
AIPMT - 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 |
 72%
Level 2: 60%+
AIPMT - 2010
Hints
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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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Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

1. Phytoplankton

2. Fish

3. Zooplankton

4. Frog

Subtopic:  Energy Flow | Ecological Pyramids |
 59%
Level 3: 35%-60%
AIPMT - 2009
Hints
The slow rate of decomposition of fallen logs in nature is due to their:

1. low moisture content

2. poor nitrogen content

3. anaerobic environment around them

4. low cellulose content

Subtopic:  Decomposition |
Level 3: 35%-60%
AIPMT - 2008
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Which of the following ecosystem types has the highest annual net primary productivity?

1. Tropical rainforest

2. Tropical deciduous forest

3. Temperate evergreen forest

4. Temperate deciduous forest

Subtopic:  Ecosystem Productivity |
 82%
Level 1: 80%+
AIPMT - 2007
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