Energy flow in an ecosystem is 

(1) unidirectional

(2) bidirectional

(3) multi-directional

(4) All the these 

Subtopic:  Energy Flow |
 93%
From NCERT
AIIMS - 2012
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Which are the primary consumers in a grazing food chain?

1. Carnivores

2. Herbivores

3. Detrivores

4. Omnivores

Subtopic:  Energy Flow |
 91%
From NCERT
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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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What does 10 per cent law say?

1. Less than 10 per cent of the energy is transferred to each trophic level from the lower trophic level
2. Only 10 per cent of the energy is transferred to each trophic level from the lower trophic level
3. Only 10 per cent of the energy is assimilated from the eaten food
4. Consumer gains 10 per cent mass of the consumed food
Subtopic:  Energy Flow |
 86%
From NCERT
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Based on the source of organism’s nutrition or food, they occupy a specific place in the food chain that is known as-

1. Strata

2. Trophic level

3. Sere

4. Chain level

Subtopic:  Energy Flow |
 88%
From NCERT
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The second trophic level in a lake is:

1. Phytoplankton

2. Zooplankton

3. Benthos

4. Fishes

Subtopic:  Energy Flow |
 88%
From NCERT
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Why does the number of trophic levels in the grazing food chain is restricted ?

1. As the transfer of energy follows 10 per cent law

2. So that food chain remains short

3. As there are few species the community

4. So that transfer of energy could be more efficient.

Subtopic:  Energy Flow |
 85%
From NCERT
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Consider the following statements:

I:  In an aquatic ecosystem, Grazing Food Chain (GFC) is the major conduit for energy flow.
II:  In a terrestrial ecosystem, Detritus Food Chain (DFC) is the major conduit for energy flow.
III:  GFC and DFC are not interconnected at any level.

Which of the above statements are true?

1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
Subtopic:  Energy Flow |
 84%
From NCERT
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Which trophic level is incorrectly defined?
1. Carnivores- secondary or tertiary consumer
2. Decomposer- microbial heterotrophs
3. Herbivores - primary consumer
4. Omnivores - Molds, yeast and mushrooms

Subtopic:  Energy Flow |
 82%
From NCERT
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What do secondary carnivores refer to?

1. Animals at second trophic level

2. Those animals that depend on the herbivores for food

3. Those animals that depend on the primary carnivores for food

4. Those animals that depend on the secondary herbivores for food

Subtopic:  Energy Flow |
 81%
From NCERT
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