00. Ecosystem and its structure
Ecosystem

260221 Match the following and select the correct option-
| | | | |
|----|----|----|----|
|(A)|Earthworm |(i)|Pioneer species|
|(B)|Succession |(ii)|Detritivore|
|(C)|Ecosystem service |(iii)|Natality|
|(D)|Population growth |(iv)|Pollination|

1 A = i; B = ii; C = i; D = iv
2 A = iv; B = i; C = iii; D = ii
3 A = iii; B = ii; C = iv; D = i
4 A = ii; B = i; C = iv; D = iii
Ecosystem

260198 Eutrophication is caused due to

1 accumulation of minerals
2 effect of UV-C
3 accumulation of metals only
4 accumulation of zooplankton
Ecosystem

260187 The temperature of water in epilimnion of a thermally stratified lake in summer in temperate regions is

1 $21^{\circ} \mathrm{C}-25^{\circ} \mathrm{C}$
2 $4^{\circ} \mathrm{C}-5^{\circ} \mathrm{C}$
3 $4^{\circ} \mathrm{C}-21^{\circ} \mathrm{C}$
4 $35^{\circ} \mathrm{C}-45^{\circ} \mathrm{C}$
Ecosystem

260189 Limiting nutrient for both natural and agricultural ecosystems is

1 Nitrogen
2 Carbon
3 Phosphorus
4 Oxygen
Ecosystem

260221 Match the following and select the correct option-
| | | | |
|----|----|----|----|
|(A)|Earthworm |(i)|Pioneer species|
|(B)|Succession |(ii)|Detritivore|
|(C)|Ecosystem service |(iii)|Natality|
|(D)|Population growth |(iv)|Pollination|

1 A = i; B = ii; C = i; D = iv
2 A = iv; B = i; C = iii; D = ii
3 A = iii; B = ii; C = iv; D = i
4 A = ii; B = i; C = iv; D = iii
Ecosystem

260198 Eutrophication is caused due to

1 accumulation of minerals
2 effect of UV-C
3 accumulation of metals only
4 accumulation of zooplankton
Ecosystem

260187 The temperature of water in epilimnion of a thermally stratified lake in summer in temperate regions is

1 $21^{\circ} \mathrm{C}-25^{\circ} \mathrm{C}$
2 $4^{\circ} \mathrm{C}-5^{\circ} \mathrm{C}$
3 $4^{\circ} \mathrm{C}-21^{\circ} \mathrm{C}$
4 $35^{\circ} \mathrm{C}-45^{\circ} \mathrm{C}$
Ecosystem

260189 Limiting nutrient for both natural and agricultural ecosystems is

1 Nitrogen
2 Carbon
3 Phosphorus
4 Oxygen
Ecosystem

260221 Match the following and select the correct option-
| | | | |
|----|----|----|----|
|(A)|Earthworm |(i)|Pioneer species|
|(B)|Succession |(ii)|Detritivore|
|(C)|Ecosystem service |(iii)|Natality|
|(D)|Population growth |(iv)|Pollination|

1 A = i; B = ii; C = i; D = iv
2 A = iv; B = i; C = iii; D = ii
3 A = iii; B = ii; C = iv; D = i
4 A = ii; B = i; C = iv; D = iii
Ecosystem

260198 Eutrophication is caused due to

1 accumulation of minerals
2 effect of UV-C
3 accumulation of metals only
4 accumulation of zooplankton
Ecosystem

260187 The temperature of water in epilimnion of a thermally stratified lake in summer in temperate regions is

1 $21^{\circ} \mathrm{C}-25^{\circ} \mathrm{C}$
2 $4^{\circ} \mathrm{C}-5^{\circ} \mathrm{C}$
3 $4^{\circ} \mathrm{C}-21^{\circ} \mathrm{C}$
4 $35^{\circ} \mathrm{C}-45^{\circ} \mathrm{C}$
Ecosystem

260189 Limiting nutrient for both natural and agricultural ecosystems is

1 Nitrogen
2 Carbon
3 Phosphorus
4 Oxygen
Ecosystem

260221 Match the following and select the correct option-
| | | | |
|----|----|----|----|
|(A)|Earthworm |(i)|Pioneer species|
|(B)|Succession |(ii)|Detritivore|
|(C)|Ecosystem service |(iii)|Natality|
|(D)|Population growth |(iv)|Pollination|

1 A = i; B = ii; C = i; D = iv
2 A = iv; B = i; C = iii; D = ii
3 A = iii; B = ii; C = iv; D = i
4 A = ii; B = i; C = iv; D = iii
Ecosystem

260198 Eutrophication is caused due to

1 accumulation of minerals
2 effect of UV-C
3 accumulation of metals only
4 accumulation of zooplankton
Ecosystem

260187 The temperature of water in epilimnion of a thermally stratified lake in summer in temperate regions is

1 $21^{\circ} \mathrm{C}-25^{\circ} \mathrm{C}$
2 $4^{\circ} \mathrm{C}-5^{\circ} \mathrm{C}$
3 $4^{\circ} \mathrm{C}-21^{\circ} \mathrm{C}$
4 $35^{\circ} \mathrm{C}-45^{\circ} \mathrm{C}$
Ecosystem

260189 Limiting nutrient for both natural and agricultural ecosystems is

1 Nitrogen
2 Carbon
3 Phosphorus
4 Oxygen