Tag: reduce, recycle, reuse

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Questions Related to reduce, recycle, reuse

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

Biodegradable pollutant is

  1. Plastic

  2. Asbestors

  3. Sewage

  4. Mercury
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Drawback of DDT as pesticide is

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

DDT has been a major pollutant because it

  1. Kills aquatic animals

  2. Kills pests

  3. Destroys many valuable species

  4. Is non-degradable
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

A non-biodegradable pollutant is

  1. Newsprint

  2. Green leaves

  3. DDT

  4. Cowdung
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

This is a nonbiodegradable pollutant  :

  1. Sewage

  2. Sulphur dioxide

  3. Oxides of nitrogen

  4. Lead vapour
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lead is a heavy metal that does not break down through biological processes in the environment. Sewage, sulfur dioxide, and nitrogen oxides can be processed or absorbed by natural systems, whereas lead persists as a toxic pollutant.

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

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

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

The most harmful environmental pollutants are

  1. human organic wastes

  2. wastes from feedlots

  3. non-biodegradable chemicals

  4. natural nutrients present in excess
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

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

  1. Biomagnification

  2. Bioaccumulation

  3. Biodegradation

  4. Bioremediation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bioaccumulation is the process by which substances, such as pesticides, build up in the tissues of an individual organism over time. Biomagnification refers to the increase in concentration of these substances as they move up the food chain.