Eutrophication causes decrease in dissolved oxygen.
BIOXII16: ENVIRONMENTAL ISSUES
345309
Eutrophication is found in
1 Waterbodies
2 Saline soil
3 Crop land
4 Mountain
Explanation:
Eutrophication is nutrient enrichment of water bodies resulting into increase in growth of algae etc. It takes place in lakes.
BIOXII16: ENVIRONMENTAL ISSUES
345303
Water body enriched with nutrients over years is called
1 Eutrophic
2 Oligotrophic
3 Trophic
4 None of these
Explanation:
Lake rich in nutrients and so supporting a dense plant population is called Eutrophic
BIOXII16: ENVIRONMENTAL ISSUES
345304
World's most problematic aquatic weed is:
1 Azolla
2 Wolffia
3 Eichhornia
4 Trapa
Explanation:
Eichhornia cut out of the light and cause an increasing in the oxygen demand. Thus causing the death of fishes and other aquatic organisms.
NCERT Exemplar
BIOXII16: ENVIRONMENTAL ISSUES
345305
BOD is increased by
1 Moses
2 Algae
3 Ferns
4 Lichens
Explanation:
Amount of oxygen required for microbes for biological oxidation in any unit volume of water is called BOD. Sewage water added in river/lake increases the BOD as oxygen level gets depleted. Algae release great amount of organic matter upon death into water body, which increases bacterial population which leads to depletion of available oxygen. Hence BOD increases.
Eutrophication causes decrease in dissolved oxygen.
BIOXII16: ENVIRONMENTAL ISSUES
345309
Eutrophication is found in
1 Waterbodies
2 Saline soil
3 Crop land
4 Mountain
Explanation:
Eutrophication is nutrient enrichment of water bodies resulting into increase in growth of algae etc. It takes place in lakes.
BIOXII16: ENVIRONMENTAL ISSUES
345303
Water body enriched with nutrients over years is called
1 Eutrophic
2 Oligotrophic
3 Trophic
4 None of these
Explanation:
Lake rich in nutrients and so supporting a dense plant population is called Eutrophic
BIOXII16: ENVIRONMENTAL ISSUES
345304
World's most problematic aquatic weed is:
1 Azolla
2 Wolffia
3 Eichhornia
4 Trapa
Explanation:
Eichhornia cut out of the light and cause an increasing in the oxygen demand. Thus causing the death of fishes and other aquatic organisms.
NCERT Exemplar
BIOXII16: ENVIRONMENTAL ISSUES
345305
BOD is increased by
1 Moses
2 Algae
3 Ferns
4 Lichens
Explanation:
Amount of oxygen required for microbes for biological oxidation in any unit volume of water is called BOD. Sewage water added in river/lake increases the BOD as oxygen level gets depleted. Algae release great amount of organic matter upon death into water body, which increases bacterial population which leads to depletion of available oxygen. Hence BOD increases.
Eutrophication causes decrease in dissolved oxygen.
BIOXII16: ENVIRONMENTAL ISSUES
345309
Eutrophication is found in
1 Waterbodies
2 Saline soil
3 Crop land
4 Mountain
Explanation:
Eutrophication is nutrient enrichment of water bodies resulting into increase in growth of algae etc. It takes place in lakes.
BIOXII16: ENVIRONMENTAL ISSUES
345303
Water body enriched with nutrients over years is called
1 Eutrophic
2 Oligotrophic
3 Trophic
4 None of these
Explanation:
Lake rich in nutrients and so supporting a dense plant population is called Eutrophic
BIOXII16: ENVIRONMENTAL ISSUES
345304
World's most problematic aquatic weed is:
1 Azolla
2 Wolffia
3 Eichhornia
4 Trapa
Explanation:
Eichhornia cut out of the light and cause an increasing in the oxygen demand. Thus causing the death of fishes and other aquatic organisms.
NCERT Exemplar
BIOXII16: ENVIRONMENTAL ISSUES
345305
BOD is increased by
1 Moses
2 Algae
3 Ferns
4 Lichens
Explanation:
Amount of oxygen required for microbes for biological oxidation in any unit volume of water is called BOD. Sewage water added in river/lake increases the BOD as oxygen level gets depleted. Algae release great amount of organic matter upon death into water body, which increases bacterial population which leads to depletion of available oxygen. Hence BOD increases.
Eutrophication causes decrease in dissolved oxygen.
BIOXII16: ENVIRONMENTAL ISSUES
345309
Eutrophication is found in
1 Waterbodies
2 Saline soil
3 Crop land
4 Mountain
Explanation:
Eutrophication is nutrient enrichment of water bodies resulting into increase in growth of algae etc. It takes place in lakes.
BIOXII16: ENVIRONMENTAL ISSUES
345303
Water body enriched with nutrients over years is called
1 Eutrophic
2 Oligotrophic
3 Trophic
4 None of these
Explanation:
Lake rich in nutrients and so supporting a dense plant population is called Eutrophic
BIOXII16: ENVIRONMENTAL ISSUES
345304
World's most problematic aquatic weed is:
1 Azolla
2 Wolffia
3 Eichhornia
4 Trapa
Explanation:
Eichhornia cut out of the light and cause an increasing in the oxygen demand. Thus causing the death of fishes and other aquatic organisms.
NCERT Exemplar
BIOXII16: ENVIRONMENTAL ISSUES
345305
BOD is increased by
1 Moses
2 Algae
3 Ferns
4 Lichens
Explanation:
Amount of oxygen required for microbes for biological oxidation in any unit volume of water is called BOD. Sewage water added in river/lake increases the BOD as oxygen level gets depleted. Algae release great amount of organic matter upon death into water body, which increases bacterial population which leads to depletion of available oxygen. Hence BOD increases.
Eutrophication causes decrease in dissolved oxygen.
BIOXII16: ENVIRONMENTAL ISSUES
345309
Eutrophication is found in
1 Waterbodies
2 Saline soil
3 Crop land
4 Mountain
Explanation:
Eutrophication is nutrient enrichment of water bodies resulting into increase in growth of algae etc. It takes place in lakes.
BIOXII16: ENVIRONMENTAL ISSUES
345303
Water body enriched with nutrients over years is called
1 Eutrophic
2 Oligotrophic
3 Trophic
4 None of these
Explanation:
Lake rich in nutrients and so supporting a dense plant population is called Eutrophic
BIOXII16: ENVIRONMENTAL ISSUES
345304
World's most problematic aquatic weed is:
1 Azolla
2 Wolffia
3 Eichhornia
4 Trapa
Explanation:
Eichhornia cut out of the light and cause an increasing in the oxygen demand. Thus causing the death of fishes and other aquatic organisms.
NCERT Exemplar
BIOXII16: ENVIRONMENTAL ISSUES
345305
BOD is increased by
1 Moses
2 Algae
3 Ferns
4 Lichens
Explanation:
Amount of oxygen required for microbes for biological oxidation in any unit volume of water is called BOD. Sewage water added in river/lake increases the BOD as oxygen level gets depleted. Algae release great amount of organic matter upon death into water body, which increases bacterial population which leads to depletion of available oxygen. Hence BOD increases.
