Decomposers like fungi and bacteria are

(i) autotrophs     (ii) heterotrophs
(iii) saprotrophs  (iv) chemo-autotrophs

Choose the correct answer

1. (i) and (iii)

2. (i) and (iv)

3. (ii) and (iii)

4. (i) and (ii)

Subtopic:  Decomposition |
 86%
From NCERT
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Q.2 The process of mineralization by microorganisms helps in the release of

1. inorganic nutrients from the humus
2. both organic and inorganic nutrients from detritus
3. organic nutrients from the humus
4. inorganic nutrients from detritus and formation of humus.

Subtopic:  Decomposition |
 63%
From NCERT
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Productivity is the rate of production of biomass expressed in

i kcal m-3 yr-1              ii gm-2 yr-1             
iii g-1 yr-1                iv kcal m-2 yr-1

1. (ii)

2. (iii)

3. (ii) and (iv)

4. (i) and (iii)

Subtopic:  Ecosystem Productivity |
 82%
From NCERT
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An inverted pyramid of biomass can be found in which the ecosystem?

1. Forest

2. Marine

3. Grassland

4. Tundra

Subtopic:  Ecological Pyramids |
 85%
From NCERT
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Which of the following is not a producer?

1. Spirogyra

2. Agaricus

3. Volvox

4. Nostoc

Subtopic:  Ecological Flow |
 67%
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Which of the following ecosystems is most productive in terms of net primary production?

1. Deserts

2. Tropical rain forests

3. Oceans

4. Estuaries

Subtopic:  Ecosystem Productivity |
 89%
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Pyramid of numbers is

1. Always upright
2. Always inverted
3. Either upright or inverted
4. Neither upright nor inverted

Subtopic:  Ecological Pyramids |
 77%
From NCERT
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Approximately how much of the solar energy that falls on the leaves of the plant is converted to chemical energy by photosynthesis?

1. Less than 1%

2. 2-10%

3. 30%

4. 50%

Subtopic:  Energy Flow |
 70%
From NCERT
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Among the following where do you think the process of decomposition would be the fastest?

1. Tropical rain forest

2. the Antarctic

3. Dry arid region

4. Alpine region

Subtopic:  Decomposition |
 88%
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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:  Ecosystem Productivity |
 76%
From NCERT
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