Tag: reduce, recycle, reuse

Questions Related to reduce, recycle, reuse

Biodegradable pollutant is

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. Plastic

  2. Asbestors

  3. Sewage

  4. Mercury

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Correct Option: C
Explanation:
Sewage is basically wastewater that contains faeces, urine, household and laundry waste, sewage needs to be treated in water treatment plant before letting it in sea body. Being organic in nature, sewage is biodegradable pollutant which can be broken down into simple substance in nature in due course of time by the action of certain microorganisms like bacteria. This process is called biodegradation/decomposition. Plastic, asbestos and mercury are non-biodegradable pollutants.
Hence, the correct answer is 'Sewage'.

Drawback of DDT as pesticide is

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. It becomes ineffective after some time

  2. It is less effective than others

  3. It is not easily/ rapidly degraded in nature

  4. Its high cost

Show answer
Correct Option: C
Explanation:

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.

Hence, the correct answer is 'It is not easily/rapidly degraded in nature'.

DDT has been a major pollutant because it

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. Kills aquatic animals

  2. Kills pests

  3. Destroys many valuable species

  4. Is non-degradable

Show answer
Correct Option: D
Explanation:

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.

Hence, the correct answer is 'Is non-degradable'.

A non-biodegradable pollutant is

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. Newsprint

  2. Green leaves

  3. DDT

  4. Cowdung

Show answer
Correct Option: C
Explanation:

A non-biodegradable pollutant is the one that could not be broken down or decomposed by the decomposing fungi and bacteria present in the water and soil. DDT is an organochlorinated compound used as an insecticide that is chemically stable. It does not dissolve in water rather it mixes with the adipose tissue in the living organisms and persists in the food chain, causing biomagnification. In the soil, it destroys the microbial fauna. 

Newsprint paper, green leaves and cow dung are all organic biomass that can be degraded easily.
Hence, the correct answer is 'DDT'.

This is a nonbiodegradable pollutant  :

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. Sewage

  2. Sulphur dioxide

  3. Oxides of nitrogen

  4. Lead vapour

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Correct Option: D

What is the correct match about biodegradable and non-biodegradable substances? 

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. Biodegradable- broken down into simpler substances by biological processes.

    Non-biodegradable- cannot be broken down into simpler ones by biological processes.

  2. Biodegradable- cannot be broken down into simpler ones by biological processes. 

    Non-biodegradable- broken down into simpler substances by biological processes.

  3. Both A and B.

  4. None of the above.

Show answer
Correct Option: A
Explanation:
Substances that are broken down into simpler substances by biological processes are said to be biodegradable. For examples, wood, paper. Substances that cannot be broken down into simpler ones by biological processes are said to be non-biodegradable. For example, plastic, DDT.

Animal dung is ______ waste.

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. biodegradable

  2. non-biodegradable

  3. hazardous

  4. toxic

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Correct Option: A

The most harmful environmental pollutants are

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. human organic wastes

  2. wastes from feedlots

  3. non-biodegradable chemicals

  4. natural nutrients present in excess

Show answer
Correct Option: C
Explanation:

biodegradable wastes are those wastes which easily gets degraded into simpler molecules over a period of time by microorganisms. Biodegradable wastes include human organic wastes, nutrients wastes etc.whereas nonbiodegradable substances accumulate in the environment and causes pollution. These wastes also sometimes accumulate in an organism when the feed upon them and through biomagnification reaches the higher concentration in higher groups.

so. the correct answer is 'non-biodegradable chemicals'.

Non-biodegradable articles are the ones which cannot be decomposed.

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. True

  2. False

Show answer
Correct Option: A
Explanation:
Non-biodegradable substances are the substances that can't be decomposed or degraded into simpler molecules by the action of microbes. Therefore these substances remain in nature for a long period of time. Such substances include plastic, polythene, metals, paints, polystyrene etc. These substances are also harmful for nature. They can be decomposed only by chemical agents.
Hence, the statement given in question is incorrect as non biodegradable articles cannot be decomposed or degraded.
So, the correct answer is 'True'.

The phenomenon of accumulation of non-biodegradable pesticides in human beings

biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

  1. Biomagnification

  2. Bioaccumulation

  3. Biodegradation

  4. Bioremediation

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Correct Option: B