Decomposition of detritus is rapid when:
1. It is rich in lignin and chitin
2. Ambient temperature is low
3. Environment favours anaerobiosis
4. It predominantly contains nitrogen and sugars

Subtopic:  Decomposition |
 83%
From NCERT
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What percentage of photosynthetic active radiation is captured by plants?

1.1 – 52.2 – 10
3.504.90

Subtopic:  Ecosystem Productivity |
 82%
From NCERT
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Organisms that are capable of conversion of inorganic material into organic material with the help of the radiant energy of the sun include:

I:  Plants
II:  Photosynthetic bacteria
III:  Chemosynthetic bacteria

 

1. I only 2. I and II only
3. I and III only 4. I, II, and III
Subtopic:  Introduction |
 61%
From NCERT
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Primary carnivores are, most aptly, characterized as:

1.Secondary producers2.Primary consumers
3.Secondary consumers4.Tertiary consumers

Subtopic:  Energy Flow |
 78%
From NCERT
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The detritus food chain:

I:  begins with dead organic matter
II:  is the major conduit of energy flow in aquatic ecosystem.

1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

Subtopic:  Energy Flow |
 72%
From NCERT
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In a terrestrial ecosystem, a much larger fraction of energy flows through the:

1.DFC2.GFC
3.Either of DFC or GFC4.Nither of DFC nor GFC

Subtopic:  Energy Flow |
 77%
From NCERT
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In an aquatic food chain, zooplankton occupy which trophic level?

1.  First 2.  Second
3.  Third 4.  Fourth
Subtopic:  Energy Flow |
 85%
From NCERT
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Organisms at each trophic level depend on those at the lower level trophic level for their energy demands except:

1.Primary consumers2.Secondary consumers
3.Tertiary consumers4.Decomposers

Subtopic:  Energy Flow |
 86%
From NCERT
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Each trophic level has a certain mass of living material at a particular time, best called as:

1.Biomass2.Standing state
3.Standing crop4.Gross productivity

Subtopic:  Energy Flow |
 82%
From NCERT
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Approximately, what percent of energy is transferred to each trophic level from the lower trophic level in an ecosystem?

1.12.10
3.504.90

Subtopic:  Energy Flow |
 94%
From NCERT
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