Tag: importance of the conservation of natural resources
Questions Related to importance of the conservation of natural resources
Which of the following is a biodegradable organic substance?
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Plastics
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Oils
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Pesticide
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Garbage
The term biodegradable is used to describe materials that decompose through the actions of bacteria, fungi, and other living organisms. Organic substances are carbon containing substances. Thus, garbage can be biodegradable organic substance.
DDT (dichloro diphenyl trichloroethane) is an example of
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Biodegradable waste
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Non-biodegradable waste
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Vermicompost
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None of these
The substance which cannot be broken down easily like pesticides, insecticides (DDT), mercury, glass particles etc. These remains as such in environment for a very very long time.
What does E-waste stand for?
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Environment waste
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Electronic waste
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Equipment waste
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All of the above
Electronic waste or e-waste describes discarded electrical or electronic devices. Used electronics which are destined for reuse, resale, salvage, recycling or disposal are also considered e-waste.
Non-biodegradable wastes are
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Biological in origin
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Commonly man made
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Degraded by microbes
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Do not accumulate in nature
Non-biodegradable wastes can not be broken down by decomposes because they do not have enzymes for the same. They are commonly man made. They are not degraded by micro organism. They pile up and accumulate in nature.
Biodegradable waste can be _______
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Naturally degraded
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Artificially degraded
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Lead enter food chain and lead to biomagnification
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All
Biodegradable wastes are naturally degraded by microbes they can also be disposed of thoughts waste treatment plants or converted into an agriculture resources of nature and compost.
Which of the following groups contain only bio-degradable items?
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Grass, flowers and leaves
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Grass, wood and plastic
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Fruit peels, cake and plastic
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Cake, wood and glass
An analysis of soil sample revealed $0.1 mg$ of a pesticide and $1 mg$ of the same of pesticide was found in grains. However in the adipose tissue of birds the concentration was $2 mg$. The reason for this is the phenomenon known as
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Bioabsorption
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Biotranslocation
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Biomagnification
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Biomulitiplication
Biomagnification is the accumulation or increasing bioconcentration of lipophilic pesticides in the top members of the food chain. During biomagnification, the concentration of pesticides goes on increasing according to the food chain and highest values occur in the consumers of the top trophic level. So, the value of pesticide will go on increasing from the soil, to the plant and to the bird.
Biodegradable pollutant is
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Plastic
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Asbestors
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Sewage
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Mercury
Drawback of DDT as pesticide is
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It becomes ineffective after some time
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It is less effective than others
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It is not easily/ rapidly degraded in nature
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Its high cost
Dichlorodiphenyltrichloroethane (DDT) is an organochlorine compound used as an insecticide in agricultural fields. The major disadvantage of DDT is bioaccumulation or not easily degrading nature, due to fat solubility it is accumulated in living tissues. The human body is not able to break it which cause its build up in the food chain and causing poisoning in the animals. Its effects can be seen in birds as the production of thin eggshells vulnerable to damage.
DDT has been a major pollutant because it
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Kills aquatic animals
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Kills pests
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Destroys many valuable species
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Is non-degradable
Dichlorodiphenyltrichloroethane (DDT) is an organochlorinated chemical used as an insecticide. This compound is highly stable in the environment. It readily stays in the adipose tissues of the living organisms and accumulates at the successive trophic level to cause the biomagnification. In soil, it is not acted upon by the decomposing bacteria so it remains persistent for years. Due to its nonbiodegradable nature, it became a major pollutant of the agricultural soil. Its use was banned by the Stockholm Convention of 2001.