Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis? 

1.Less than 1%2.2-10 %
3.30 %4.50 %

Subtopic:  Energy Flow |
 65%
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Among the following, where do you think the process of decomposition would be the fastest?

1.Tropical rain forest2.Antarctic
3.Dry arid region4.Alpine region

Subtopic:  Decomposition |
 87%
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How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores? 

1.1%2.10%
3.40%4.90%

Subtopic:  Energy Flow |
 71%
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During the process of ecological succession, the changes that take place in communities are :
1. Orderly and sequential
2. Random
3. Very quick
4. Not influenced by the physical environment

Subtopic:  Ecological Succession (OLD NCERT) |
 89%
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Climax community is in a state of :
1. Non-equilibrium
2. Equilibrium
3. Disorder
4. Constant change

Subtopic:  Ecological Succession (OLD NCERT) |
 88%
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Among the following bio-geo-chemical cycles, which one does not have losses due to respiration? 
1. Phosphorus
2. Nitrogen
3. Sulphur
4. All of the above

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 69%
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The sequence of communities of primary succession in water is :

1.  Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses, and trees.
2.  Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses, and trees.
3.  Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses, and trees.
4.  Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow, and trees.

Subtopic:  Ecological Succession (OLD NCERT) |
 67%
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If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be 

1.Scavenger2.Tertiary producer
3.Tertiary consumer4.Secondary consumer

Subtopic:  Energy Flow |
 71%
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Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100 mm?
1. Grassland
2. Shrubby forest
3. Desert
4. Mangrove

Subtopic:  Components & Types of Ecosystems |
 74%
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The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called?

1.Pelagic zone2.Benthic zone
3.Lentic zone4.Littoral zone

Subtopic:  Components & Types of Ecosystems |
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