Tag: species, communities and ecosystems
Questions Related to species, communities and ecosystems
The flow of materials from non living components to living components and back to the non living components in a more or less cyclic manner is called as
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Gaseous cycle
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Sedimentary cycle
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Biogeochemical cycle
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Hydrologic cycle
A biogeochemical cycle or inorganic-organic cycle is a circulating or repeatable pathway by which either a chemical element or a molecule moves through both biotic (bio-) and abiotic (geo-) compartments of an ecosystem.
Source of maximum sulphur in reservoir of sulphur is
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Ocean
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Lakes
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Rocks
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Both A and C
The ocean represents a major reservoir of sulphur on earth, with large quantities in the form of dissolved sulphate and sedimentary minerals (e.g., gypsum and pyrite). Sulphate is the most stable form of sulphur on earth; weathering and leaching of rocks and sediments are its main sources to the ocean. The majority of sulphur is found in seawater or sedimentary rocks especially pyrite rich shales and evaporite rocks.
Biogeochemical cycles are also known as
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Cycles of matter
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Sedimentary cycles
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Material cycling
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Gaseous cycles
Biogeochemical cycles may also be referred to as cycles of matter because they link together all organisms and abiotic features on earth. Matter is continually recycled among living and abiotic elements on earth. Biogeochemical cycles facilitate the transfer of matter from one form to another and from one location to another on planet earth.
Biogeochemical cycles can be traced in
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Ecosystems
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Biomes
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Only water
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Both A and B
Biogeochemical cycles are the nutrient cycles. These are the cycles which are responsible for the recycling of the nutrients. The chemical cycles are necessary for the metabolism and maintenance of the organisms in the ecosystem. Biome is a collection of many ecosystems. The nutrient recycling takes place in the ecosystem and biomes.
The natural cycle that circulates elements between the earth and the environment is called as
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Biological cycle
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Chemical cycle
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Biogeochemical cycle
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None of the above
Biogeochemical cycles are the nutrient cycles. These are the cycles which are responsible for the recycling of the nutrients which are present in the geosphere and atmosphere. The nutrient recycling takes place in the ecosystem and biomes. The recycling of nutrients helps in maintaining the nutrients in the available form for the uptake by the organisms.
Which of the following is a sedimentary cycle?
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Carbon
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Hydrogen
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Nitrogen
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Phosphorus
The abiotic components which are recycled without any involvement of the gaseous form are known as the sedimentary cycle. The element is present in the form of salts as rocks in the geosphere which is taken up by the plants and then transferred to the animals. The phosphate is generally transferred and used in the form of ATP by the living cells.
Plant maintains the balance of ......... in the atmosphere.
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Oxygen
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Carbon dioxide
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Oxygen and Carbon dioxide
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None of these
Photosynthesis is the process in which autotrophs such as green plants use carbon dioxide and water in presence of sunlight to synthesize nutrients such carbohydrates in the form of glucose and release oxygen. Hence oxygen is returned to the atmosphere by photosynthesis. This oxygen from the atmosphere is taken in by animals for carrying out the process of respiration and carbon dioxide is evolved. This carbon dioxide is used by plants and the same cycle continues. Hence plants maintain the balance of oxygen and carbon dioxide in the atmosphere. Thus the correct answer is option C.
An ecosystem, such as an aquarium, is self-sustaining if it involves the interaction between organisms, a flow of energy, and the presence of
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Equal numbers of plants and animals
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More animals than plants
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Materials cycles
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Pioneer organisms
If a ecosystem such as an ecosystem is to be self-sustaining, materials such as oxygen, carbon dioxide, water and nitrogen must be able to recycle between the organisms.
The conversion of $\displaystyle $ is known as
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Denitrification
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Nitrification
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Nitrogen fixation
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Ammonification
Biogeochemical cycles
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Include the processes only conducted by or within living organisms
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Pertain only to the abiotic environment
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Describe the movement of water and other materials throughout the abiotic and biotic environment
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Are used to describe the attempts of humans to recycle various pollutants