Read the given statements stating true (T) and false (F) and select the correct option.

A. Anthropogenic ecosystem possess self regulatory mechanism

B. Forest is a natural ecosystem

C. Estuaries is a terrestrial ecosystem

 

A

B

C

1.

T

T

F

2.

F

T

F

3.

F

F

T

4.

T

F

F

Subtopic:  Components & Types of Ecosystems |
 54%
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In grassland ecosystem the pyramid of biomass and energy will be     A     and    B    respectively.

Choose the correct option to fill the blanks A and B.

         A          B

1. Upright  Upright

2. Upright  Inverted

3. Inverted Upright

4. Inverted Inverted

Subtopic:  Ecological Pyramids |
 83%
From NCERT
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The rate of decomposition of detritus is slow when

1. It contains lignin, chitin, tannins and cellulose

2. Temperature is more than 25°C

3. It contains proteins

4. There is good aeration

Subtopic:  Decomposition |
 93%
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How many of these have no place in ecological pyramids?

Detritivores, Scavengers, Decomposers, Producers, Insectivorous plant

1. 2

2. 3

3. 4

4. 1

Subtopic:  Ecological Pyramids |
From NCERT
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For which of the following predatory food chain pyramid of biomass is inverted?

1. Grass  Insect  Snake  Frog

2. Detritus  Sparrow  Earthworms

3. Phytoplanktons  Zooplanktons  Fish

4. Tree  Birds  Parasite

Subtopic:  Ecological Pyramids |
 84%
From NCERT
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Standing crop is: 

(i) Amount of detritus in unit area
(ii) Number of living organisms in unit area
(iii) Amount of nutrients such as carbon, nitrogen, and calcium in unit area
(iv) Biomass in unit area

1. (i) and (iv)

2. (i) and (iii)

3. (ii) and (iv)

4. only (iv)

Subtopic:  Ecological Pyramids |
 65%
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The ecological pyramid of numbers in pond ecosystem is :-

1. Inverted

2. Upright

3. May be upright or inverted

4. First upright then inverted

Subtopic:  Ecological Pyramids |
 57%
From NCERT
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Ecosystem which shows above pyramid of biomass possess ______ and _______ pyramid of number and energy respectively.

1.  Inverted, upright

2.  Upright, upright

3.  Upright, inverted

4.  Spindle, upright

 

Subtopic:  Ecological Pyramids |
From NCERT
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Which of the following is not correctly matched?

1.  Productivity    -    Rate of biomass production

2.  Gross primary productivity of earth    -    Rate of productivity of organic matter during photosynthesis 

3.  Net primary productivity    -    Available biomass for consumption by heterotrophs

4.  Secondary productivity    -     Formation of new organic matter by producers 

Subtopic:  Ecosystem Productivity |
 79%
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GPP utilizes ___________ of incident radiation

1. 1 - 5%

2. 2 - 10%

3. 0.8 - 4%

4. 1.6 - 8%

Subtopic:  Energy Flow |
From NCERT
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