Tag: our environment - our concern

Questions Related to our environment - our concern

The phenomenon of accumulation of heavy metal and pesticide in trophic level is called as

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Eutrophication

  2. Biomagnification

  3. Composting

  4. Mining

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Correct Option: B
Explanation:

Biomagnification is defined as the process by which a compound (such as a pollutant or pesticide) increases its concentration in the tissues of organisms as it moves up the trophic levels

So, the correct answer is 'Biomagnification'

Codons of Arginine are?

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. CGU, CGC, CGG

  2. CAC, CAG, CAU

  3. GGU, GGC, GGA

  4. CGU, CCC, CGG

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Correct Option: A

Biomagnification refers to?

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Breeding of crops that are rich in minerals and vitamins, good proteins and healthier fats for human health

  2. Increase in concentration of the toxicant at successive trophic levels

  3. Exploiting at molecular, Genetic and species level diversity for the products of economic importance

  4. Decomposition of organic waste in water by the action of microbes

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Correct Option: B

The occurrence of pesticides like DDT in higher trophic levels is termed as

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. bioremediation

  2. biomagnification

  3. biological enhancement

  4. biopollution

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Correct Option: B

The term "bio-magnification" refers to the

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Growth of organism due to food consumption.

  2. Increase in population size.

  3. Blowing up of environmental issues by man

  4. Increase in the concentration of non-degradable pollutants as they pass through food chain.

  5. Decrease in population size.

Show answer
Correct Option: D
Explanation:

The biotic components of an ecosystem are arranged in several trophic levels which are interdependent on each other. The energy produced at one level is passed to another level. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level. This phenomenon is well known for mercury and DDT. 

Which of the following is associated with biological amplification? 

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. SO$ _4$

  2. DDT

  3. Sewage

  4. All of the above

Show answer
Correct Option: B
Explanation:

The different trophic level of an ecosystem interacts with each other and they are interdependent on each other. Biological magnification is a process where pollutants such as pesticides or heavy metals move up the food chain, passes into rivers or lakes and consumed by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans. It occurs when the concentration of a substance, such as DDT or mercury, in an organism, exceeds the background concentration of the substance in its diet. 

Thus, the correct answer is option B.

Biomagnification means

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Accumulation of pesticide through food chain

  2. Accumulation of pesticide in water

  3. Increased pesticide degradation

  4. Decrease pesticide degradation

Show answer
Correct Option: A
Explanation:

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level. Thus, the correct answer is option A.

The term 'bio-magnification' refers to the 

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Increase in population size

  2. Increase in the concentration of non-degradable pollutants as they pass through the food chains

  3. Blowing up of environmental issues by man

  4. Growth of organisation due to food consumption

Show answer
Correct Option: B
Explanation:

Biomagnification (or bioaccumulation) refers to the increase in the concentration of non-degradable pollutants as they pass through the food chains. It is the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans. 

Therefore, the correct answer is option B.

Increasing concentration of accumulated pollutant along food chain is

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Biomagnification

  2. Bioaccumulation

  3. Eutrophication

  4. Nutrient cycling

Show answer
Correct Option: A
Explanation:

A few toxic substances, often present in industrial wastewaters, can undergo biological magnification (biomagnification) in the aquatic food chain. Biomagnification refers to an increase in the concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level in a food chain.

Biological magnification refers to

zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

  1. Increase in the concentration of insecticide in animals

  2. Increase in the concentration of organophosphate in plants

  3. Decrease in the concentration of insecticide in animals

  4. Increase in the number of animals and plants in ecosystem

Show answer
Correct Option: A
Explanation:

Biomagnification is the accumulation or increasing concentration of lipophilic pesticides in the top members of the food chain. During biomagnification, the concentration of non-degradable pesticide like DDT goes on increasing along the food chain and highest values occur in the consumers of the top trophic level. So, the value of pesticide will go on increasing at each trophic level. 

Thus, the correct answer is option A.