260355
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
1 Nitrogen cycle
2 Carbon cycle
3 Sulphur cycle
4 Phosphorus cycle
Explanation:
Phosphorus cycle is a biogeochemical process that involve the movement of phosphorous through the lithosphere, hydrosphere and biosphere. Phosphorus cycle is a slow process of various weather processes help to wash the phosphorus present in the rocks into the soil. Phosphorus is absorbed by the organic matter in the soil which is used for various biological processes.
AIPMT (Screening)-2012
Ecosystem
260356
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas $\left(\mathrm{N}_2\right)$ to the atmosphere?
1 Anaerobic ammonium oxidation and denitrification
2 Aerobic nitrate oxidation and nitrite reduction
3 Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
4 Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes
Explanation:
Denitrification is a chemical process in which nitrates in the soil are reduced to molecular nitrogen $\left(\mathrm{N}_2\right)$ which is released into the atmosphere. - It is done by denitrifying bacteria like pseudomonas denitrificans in the atmosphere. - Anaerobic oxidation of ammonium $\left(\mathrm{NH}_4\right)$ also releases nitrogen in the atmosphere.
NEET (Karnataka)-2013
Ecosystem
260336
The natural cycling of carbon between organism and their environment is directly accomplished through:
1 radiations of solar emery
2 photosynthesis and respiration
3 nutrition and excretion
4 all of the above
Explanation:
The natural cycling of carbon between organism and their environment is directly accomplished through photosynthesis and respiration. In carbon cycle $\mathrm{CO}_2$ in the atmosphere which is utilized by green plants in photosynthesis for making their food. The plants are eaten by animals. After their death both plants and animals are acted upon by decomposers and thus organic substances are broken down into $\mathrm{CO}_2$ \& $\mathrm{H}_2 \mathrm{O}$, which again are utilized by plants. The $\mathrm{CO}_2$ is also returned to atmosphere by the process of respiration of plants or animals.
Uttarakhand PMT-2006
Ecosystem
260341
Eutrophication is seen in :
1 saline soil
2 agricultural land near thermal plant
3 lake
4 mountain
Explanation:
Eutrophication is the natural aging of a lake by nutrient enrichment of its water. It a young lake the water is cold and clear, supporting little life with time, streams draining into the lake introduce nutrients such as nitrogen and phosphorus. Thus the eutrophication is seen in lake.
260355
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
1 Nitrogen cycle
2 Carbon cycle
3 Sulphur cycle
4 Phosphorus cycle
Explanation:
Phosphorus cycle is a biogeochemical process that involve the movement of phosphorous through the lithosphere, hydrosphere and biosphere. Phosphorus cycle is a slow process of various weather processes help to wash the phosphorus present in the rocks into the soil. Phosphorus is absorbed by the organic matter in the soil which is used for various biological processes.
AIPMT (Screening)-2012
Ecosystem
260356
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas $\left(\mathrm{N}_2\right)$ to the atmosphere?
1 Anaerobic ammonium oxidation and denitrification
2 Aerobic nitrate oxidation and nitrite reduction
3 Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
4 Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes
Explanation:
Denitrification is a chemical process in which nitrates in the soil are reduced to molecular nitrogen $\left(\mathrm{N}_2\right)$ which is released into the atmosphere. - It is done by denitrifying bacteria like pseudomonas denitrificans in the atmosphere. - Anaerobic oxidation of ammonium $\left(\mathrm{NH}_4\right)$ also releases nitrogen in the atmosphere.
NEET (Karnataka)-2013
Ecosystem
260336
The natural cycling of carbon between organism and their environment is directly accomplished through:
1 radiations of solar emery
2 photosynthesis and respiration
3 nutrition and excretion
4 all of the above
Explanation:
The natural cycling of carbon between organism and their environment is directly accomplished through photosynthesis and respiration. In carbon cycle $\mathrm{CO}_2$ in the atmosphere which is utilized by green plants in photosynthesis for making their food. The plants are eaten by animals. After their death both plants and animals are acted upon by decomposers and thus organic substances are broken down into $\mathrm{CO}_2$ \& $\mathrm{H}_2 \mathrm{O}$, which again are utilized by plants. The $\mathrm{CO}_2$ is also returned to atmosphere by the process of respiration of plants or animals.
Uttarakhand PMT-2006
Ecosystem
260341
Eutrophication is seen in :
1 saline soil
2 agricultural land near thermal plant
3 lake
4 mountain
Explanation:
Eutrophication is the natural aging of a lake by nutrient enrichment of its water. It a young lake the water is cold and clear, supporting little life with time, streams draining into the lake introduce nutrients such as nitrogen and phosphorus. Thus the eutrophication is seen in lake.
260355
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
1 Nitrogen cycle
2 Carbon cycle
3 Sulphur cycle
4 Phosphorus cycle
Explanation:
Phosphorus cycle is a biogeochemical process that involve the movement of phosphorous through the lithosphere, hydrosphere and biosphere. Phosphorus cycle is a slow process of various weather processes help to wash the phosphorus present in the rocks into the soil. Phosphorus is absorbed by the organic matter in the soil which is used for various biological processes.
AIPMT (Screening)-2012
Ecosystem
260356
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas $\left(\mathrm{N}_2\right)$ to the atmosphere?
1 Anaerobic ammonium oxidation and denitrification
2 Aerobic nitrate oxidation and nitrite reduction
3 Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
4 Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes
Explanation:
Denitrification is a chemical process in which nitrates in the soil are reduced to molecular nitrogen $\left(\mathrm{N}_2\right)$ which is released into the atmosphere. - It is done by denitrifying bacteria like pseudomonas denitrificans in the atmosphere. - Anaerobic oxidation of ammonium $\left(\mathrm{NH}_4\right)$ also releases nitrogen in the atmosphere.
NEET (Karnataka)-2013
Ecosystem
260336
The natural cycling of carbon between organism and their environment is directly accomplished through:
1 radiations of solar emery
2 photosynthesis and respiration
3 nutrition and excretion
4 all of the above
Explanation:
The natural cycling of carbon between organism and their environment is directly accomplished through photosynthesis and respiration. In carbon cycle $\mathrm{CO}_2$ in the atmosphere which is utilized by green plants in photosynthesis for making their food. The plants are eaten by animals. After their death both plants and animals are acted upon by decomposers and thus organic substances are broken down into $\mathrm{CO}_2$ \& $\mathrm{H}_2 \mathrm{O}$, which again are utilized by plants. The $\mathrm{CO}_2$ is also returned to atmosphere by the process of respiration of plants or animals.
Uttarakhand PMT-2006
Ecosystem
260341
Eutrophication is seen in :
1 saline soil
2 agricultural land near thermal plant
3 lake
4 mountain
Explanation:
Eutrophication is the natural aging of a lake by nutrient enrichment of its water. It a young lake the water is cold and clear, supporting little life with time, streams draining into the lake introduce nutrients such as nitrogen and phosphorus. Thus the eutrophication is seen in lake.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Ecosystem
260355
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
1 Nitrogen cycle
2 Carbon cycle
3 Sulphur cycle
4 Phosphorus cycle
Explanation:
Phosphorus cycle is a biogeochemical process that involve the movement of phosphorous through the lithosphere, hydrosphere and biosphere. Phosphorus cycle is a slow process of various weather processes help to wash the phosphorus present in the rocks into the soil. Phosphorus is absorbed by the organic matter in the soil which is used for various biological processes.
AIPMT (Screening)-2012
Ecosystem
260356
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas $\left(\mathrm{N}_2\right)$ to the atmosphere?
1 Anaerobic ammonium oxidation and denitrification
2 Aerobic nitrate oxidation and nitrite reduction
3 Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
4 Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes
Explanation:
Denitrification is a chemical process in which nitrates in the soil are reduced to molecular nitrogen $\left(\mathrm{N}_2\right)$ which is released into the atmosphere. - It is done by denitrifying bacteria like pseudomonas denitrificans in the atmosphere. - Anaerobic oxidation of ammonium $\left(\mathrm{NH}_4\right)$ also releases nitrogen in the atmosphere.
NEET (Karnataka)-2013
Ecosystem
260336
The natural cycling of carbon between organism and their environment is directly accomplished through:
1 radiations of solar emery
2 photosynthesis and respiration
3 nutrition and excretion
4 all of the above
Explanation:
The natural cycling of carbon between organism and their environment is directly accomplished through photosynthesis and respiration. In carbon cycle $\mathrm{CO}_2$ in the atmosphere which is utilized by green plants in photosynthesis for making their food. The plants are eaten by animals. After their death both plants and animals are acted upon by decomposers and thus organic substances are broken down into $\mathrm{CO}_2$ \& $\mathrm{H}_2 \mathrm{O}$, which again are utilized by plants. The $\mathrm{CO}_2$ is also returned to atmosphere by the process of respiration of plants or animals.
Uttarakhand PMT-2006
Ecosystem
260341
Eutrophication is seen in :
1 saline soil
2 agricultural land near thermal plant
3 lake
4 mountain
Explanation:
Eutrophication is the natural aging of a lake by nutrient enrichment of its water. It a young lake the water is cold and clear, supporting little life with time, streams draining into the lake introduce nutrients such as nitrogen and phosphorus. Thus the eutrophication is seen in lake.
