Q. No.Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.
Options :
A
B
C
D
1.
Rock minerals
Detritus
Litter fall
Producers
2.
Litter
Producers
Rock minerals
Detritus
3.
Detritus
Rock minerals
Producer
Litter fall
4.
Producers
Litter fall
Rock minerals
Detritus
A
B
C
D
1.
Rock minerals
Detritus
Litter fall
Producers
2.
Litter
Producers
Rock minerals
Detritus
3.
Detritus
Rock minerals
Producer
Litter fall
4.
Producers
Litter fall
Rock minerals
Detritus
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Match the following and select the correct option :
(a) Earthworm (i) Pioneer species
(b) Succession (ii) Detrivore
(c) Ecosystem service (iii) Natality
(d) Population growth (iv) Pollination
a b c d
1. (i) (ii) (iii) (iv)
2. (iv) (i) (iii) (ii)
3. (iii) (ii) (iv) (i)
4. (ii) (i) (iv) (iii)
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Vertical distribution of different species occupying different levels in a biotic community is known as:
1. Stratification
2. Zonation
3. Pyramid
4. Divergence
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The mass of living material at a trophic level at a particular time is called:
1. Standing state
2. Net primary productivity
3. Standing crop
4. Gross primary productivity
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In an ecosystem the rate of production of organic matter during photosynthesis is termed as :
1. Gross primary productivity
2. Secondary productivity
3. Net productivity
4. Net primary productivity
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Secondary Succession takes place on/in :
1. Degraded forest
2. Newly created pond
3. Newly cooled lava
4. Bare rock
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Most animals are tree dwellers in a :
1. thorn woodland
2. temperate deciduous forest
3. tropical rain forest
4.coniferous forest
The primary producers of the deep-sea hydrothermal vent ecosystem are
1. coral reefs
2. green algae
3. chemosynthetic bacteria
4.blue-green-algae
Which ecosystem has the maximum biomass
1. Forest ecosystem
2. Grassland ecosystem
3. Pond ecosystem
4. Lake ecosystem
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