Tag: ecosystem productivity and decomposition
Questions Related to ecosystem productivity and decomposition
During the process of decomposition.
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$CO _2$ is consumed and $O _2$ is released
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$O _2$ is consumed and $CO _2$ is released
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$CO _2$ is consumed and $H _2O$ is released
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None of these
Decomposition is the process that concerns breakdown of complex organic matter by decomposers to inorganic raw materials like carbon dioxide, water and various nutrients. Oxygen is required by aerobic bacteria for decomposition.
Decomposers are also called as.
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Transducers
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Reducers
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Micro-consumers
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Both (b) and (c)
Decomposers are also called as reducers because they are able to remove or degrade the dead bodies of organisms and due to their small size they are known as microconsumers.
Given is a table of factors affecting microbial decomposition. ($'+'$ means 'favouring' and $'-'$ means inhibiting or lowering). Select the correct option.
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High temperature- $+$, Lack of oxygen- $+$, Moist environment- $+$, Lignin and chitin in detritus- $-$
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High temperature- $+$, Lack of oxygen- $-$, Moist environment- $+$, Lignin and chitin in detritus- $-$
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High temperature- $-$, Lack of oxygen- $-$, Moist environment- $+$, Lignin and chitin in detritus- $-$
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High temperature- $-$, Lack of oxygen- $+$, Moist environment- $+$, Lignin and chitin in detritus- $-$
Decomposition is a type of ______
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aerobic respiration
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anaerobic respiration
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exothermic reaction
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none of these.
When organic materials decompose in the presence of oxygen, the process is called “aerobic.” The aerobic process is most common in nature. For example, it takes place on ground surfaces such as the forest floor, where droppings from trees and animals are converted into relatively stable humus. There is no accompanying bad smell when there is adequate oxygen present. In aerobic decomposition, living organisms, which use oxygen, feed upon the organic matter. They use the nitrogen, phosphorus, some of the carbon, and other required nutrients. Much of the carbon serves as a source of energy for the organisms and is burned up and respired as carbon dioxide. Since carbon serves both as a source of energy and as an element in the cell protoplasm, much more carbon than nitrogen is needed. Generally, about two-thirds of carbon is respired as $C0 _2$, while the other third is combined with nitrogen in the living cells. However, if the excess of carbon over nitrogen (C: N ratio) inorganic materials being decomposed is too great, biological activity diminishes. Several cycles of organisms are then required to burn most of the carbon.
The rotting dead matter in the soil is called
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Weathering
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Humus
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Soil profile
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Top soil
_____________ carry out decomposition process.
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Microorganisms
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Animals
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Both A and B
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Decomposers
Decomposers are organisms that break down dead or decaying organisms, and in doing so they carry out the natural process of decomposition.
.......... play a very important role in decomposition of organic matter in the soil
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Cat
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Plants
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Microorganisms
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All of the above
Micro-organisms dwell in soil. They contribute to various processes related to the soil, plants and atmosphere. One of the processes is decomposition of dead remains of plants and animals
The rate of decomposition of hydrogen peroxide can be slowed down through
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Glycerin
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Manganese oxide
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Vanadium oxide
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Platinum
Glycerin
Glycerin affects the rate of decomposition of hydrogen peroxide and slows down the reaction.
Which of these help in decomposition of organic wastes?
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Bacteria
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Fungi
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Earthworm
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All of the above
When organic wastes such as leftover food, plant and animals waste is collected in heaps, decomposers such as bacteria, insects such as earthworms and fungi act on it and break it down. This product which is formed by this action of decomposers is called compost. This process is called composting and the compost can be used to increase the plant yield. Thus the correct answer is option D.
Which of the following gases is/are produced by decomposers during the decaying process?
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Only carbon dioxide gas
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Only carbon dioxide and nitrogen gases
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Only oxygen gas
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Only carbon dioxide and oxygen gases
Decomposers feed on the dead or decaying organic matter(carbohydrate, proteins and lipids ) and produce nitrogen and carbon dioxide gases as an organic matter are mainly made up of carbon, oxygen, hydrogen and nitrogen. Thus, the correct answer is option B.