The pesticides and nondegradable. They have much affinity for fats. Hence, they tend to move into living organisms. They get concentrated as they move up the food chains. For example at each trophic level, the accumulation of insecticide is increased by 10 times. For example, if the goat gets one part per million of DDT from the grass is it will have 10 parts per million in its tissues. The man eating the good will have 100 PPM. The man-eating tiger will have thousand PPM. If the food chain is still greater the accumulation will still be higher. Is increasing accumulation of insecticide and the higher organism is called biomagnification which is biological amplification.

Chlorinated hydrocarbons like DDT pass into the food chain and increase in amount per unit weight of organisms with the rise in trophic level due to their accumulation in fat. Among the given animals, seagull which is a fish-eating bird and is present at a higher trophic level will have high levels of DDT deposition in its body.

Biomagnification refers to increase in concentration of 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.

The higher amounts of pesticide like DDT, disturb calcium metabolism of birds resulting in thinning of egg shells and their premature breaking. This is a major cause of reduction of population of fish eating birds. Biomagnification is found in all types of food chains.

The amplification of a toxic compound which is resistant to elimination from the body and accumulates with each trophic level is known as Bioaccumulation/Biomagnification.

• Algal bloom: It is the rapid growth of algae in water due to which coloured scums are formed on the surface.
• Biomagnification: When a toxic substance gets incorporated in the food chain, its concentration gets increased at each successive trophic level. This is called biomagnification.
  
• Eutrophication: It is the phenomenon of nutrient enrichment of nitrogen and phosphorus in a water body that supports a dense growth of plants and animal life. Due to nutrient enrichment, excess growth of algae occurs which is called algal bloom. When these algae die, their organic matter gets decomposed and this results in the depletion of oxygen leading to death of aquatic animals. This process is called eutrophication. 

Snake is likely to show highest concentration of DDT once it has been introduced into the ecosystem.

If a lake is polluted with pesticides, large fish will contain the maximum amount of pesticide. The process due to which large fish will contain the maximum amount of pesticide is called biological magnification. It is also called as biomagnification. Phytoplanktons and zooplanktons absorb pesticide from the polluted water. Small fishes eats phytoplankton and zooplanktons. There will be increased accumulation of pesticide in their bodies. These small fishes are eaten by big fish. Hence, the big fish will have the maximum amount of pesticide.

• Biochemical oxygen demand (BOD) is a measure of how much organic pollution is in water. The BOD test measures the amount of dissolved oxygen in water that is used up due to the breakdown of organic pollutants, such as sewage, in a certain number of days. 
  
• Increased BOD means that a lot of oxygen is being used up, typically by bacteria breaking down organic material. 
  

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

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. 

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. 

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.

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. 

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.

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. 

In India, prolonged use of 0.02-13 ppm of DDT (pesticide) can be detected in the body fat of the people. Most toxic pollutants such as pesticides do not degrade easily and therefore accumulate within the body of an organism specially in fat deposited portion. This process is known as biochemical concentration. 

Biomagnification is process of transfer of toxic substance such as DDT and Mercury, in increasing concentration in successive trophic level of food chain.
Pollutant increases in concentration from Producers → Primary consumers → Secondary consumers →Tertiary consumers → Top consumer. 

Slow metabolism and excretion of PCB cause its accumulation in tissues of organisms (plants and insects of that area). Top carnivores exhibit more accumulation of PCBs when they feed on lower trophic levels; the process is called as biomagnification. Vultures are top carnivores and hence their eggshells exhibited the higher amount of PCB due to the process of biomagnification. Thus, the correct answer is option A.

Organisms at higher trophic levels in a food chain can experience biomagnification, which is the accumulation of environmental toxins (such as heavy metals) in living tissue. Organisms at lower trophic levels accumulate small amounts of toxins through their food. Because organisms at the next highest trophic level eat many of the lower-level organisms, they take in higher amounts of the toxins. At the highest trophic levels, increased concentrations of toxins in organisms’ tissues can be dangerous. This bird tissue has a high concentration of a specific heavy metal, so the species must be at a high trophic level. Therefore, the correct answer is option E.

Slow metabolism and excretion of pesticides cause their accumulation in fat tissues of organisms (biomagnifications), particularly affecting the top consumers (carnivores) causing the decrease in their population size. Pesticides in water (through agricultural runoff) concentrate in fishes and then in Osprey (Ospreys feed on fishes). Biological Magnification is an accumulation of substances over subsequent trophic levels in the food chain. Thus, the correct answer is option A.

A few toxic substances, often present in industrial wastes, can undergo biological magnification (biomagnification) in the food chain. 

This shows the biomagnification of DDT in the aquatic ecosystem food chain.

Biomagnification is the property of a toxin to accumulate in the food chain by solubilizing with the adipose tissues of the living organisms. It is seen that the level of nondegradable pollutants increases as the food chain progresses. It means, the primary consumers will have more nondegradable pollutants concentration than the producers, the secondary consumers will have more than primary consumers and so on. The highest concentrations will be seen in the top carnivore. This is because the consumers at the successive trophic level consume more than the previous level to fulfil the energy requirements. Due to this, nondegradable pollutants keeps on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification.

DDT is an organochlorinated compound that was used as an insecticide. It is highly stable and is not degradable. It tends to stay in the adipose tissue of the living organisms. Due to this property, it enters the food chain and is accumulated at each trophic level. As the primary consumers eat more producers and similarly, secondary consumers eat more primary consumers, the organisms at the higher trophic levels will have an increased concentration of DDT. This process is called d the boimagnification.

Persistent pesticides are stable in chemical nature and tend to solubilize in the fats of the living organisms, these show persistence in the food chain. It is seen that the level of persistent pesticides increases as the food chain progresses. It means, the primary consumers will have more persistent pesticides concentration than the producers, the secondary consumers will have more than primary consumers and so on. The highest concentrations will be seen in the top carnivore. This is because the consumers at the successive trophic level consume more than the previous level to fulfil the energy requirements. Due to this, persistent pesticides keep on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification.

Biomagnification, also known as bio-amplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain. The substances become increasingly concentrated in tissues or internal organs as they move up the chain. Bioaccumulants are substances that increase in concentration in living organisms as they take in contaminated air, water, or food because the substances are very slowly metabolized or excreted.

 It is seen that the level of toxicant increases as the food chain progresses. It means, the primary consumers will have more toxicant concentration than the producers, the secondary consumers will have more than primary consumers and so on. The highest concentrations will be seen in the top carnivore. This is because the consumers at the successive trophic level consume more than the previous level to fulfil the energy requirements. Due to this, toxicant keeps on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification. So, planktons will have least and birds will have the most toxicant presence.

The toxic substances which cannot be metabolized get accumulated at a particular trophic level. This leads to increase in the concentration of the toxicant at successive trophic levels. This phenomenon is called as biological magnification and well-known for mercury and DDT. Higher the trophic level of an organism in the food chain greater will be the magnification of toxic chemicals.

Biological magnification is the process of increasing concentration of the toxic substances in the living organism as they go up the food chain.

Biomagnification is the process where the concentration of toxic compounds increases in the body of the organisms through the food chain. The organisms at the higher trophic level will have more concentration of the compounds. Here, fishes are at the highest trophic level, so they will accumulate maximum amount of pesticides. So, the correct answer is 'Fishes'.

Biomagnification, also known as bioamplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain. Biomagnification process occurs when certain toxic chemicals and pollutants such as heavy metals, pesticides or polychlorinated biphenyls (PCBs) compounds go up the food chain by working their way through the environment and into the soil or the water systems after which they are eaten by aquatic animals or plants. Biomagnification occurs in the higher trophic levels of the food chain/web , where exposure to chemicals takes place mostly through food consumption rather than water uptake. Spraying a marsh to control mosquitoes will cause trace amounts of DDT to accumulate in the cells of microscopic aquatic organisms causing accumulation which cannot be metabolized.

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. 

A few toxic substances, often present in industrial wastewaters, can undergo biological magnification in the aquatic food chain. Biomagnification refers to 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. This phenomenon is well known for mercury and DDT. The concentration of DDT is increased  at successive trophic levels. For example, if it starts at 0.003 ppb (ppb = parts per billion) in water, it can ultimately reach 25 ppm (ppm = parts per million) in fish-eating birds, through biomagnification. 

In India, prolonged use of 0.02-13 ppm of DDT (pesticide) can be detected in the body fat of the people. Most toxic pollutants such as pesticides do not degrade easily and therefore accumulate within the body of an organism specially in fat deposited portion. This process is known as biochemical concentration.

There are pesticides which have been detected in the aerated soft drinks by the researchers. These pesticides are known to accumulate within the tissues of the body. The permissible limit of pesticides in drinking water is 0.02 ppm. The accumulation of the pesticides may result in interference in the metabolic activities of the body. There are certain pesticides which are toxic and accumulation might degrade the tissues. 

Dichlorodiphenyltrichloroethane (DDT) is chemically an organochlorine that was used an insecticide. It is a stable compound that shows high solubility in the fatty tissues. When it is released in the water via the agricultural field surface run-off, it is ingested by the aquatic organisms like phytoplankton that are main producers in an aquatic food chain. From these, DDT continues rising up the food chain. Because successive consumers at the successive trophic level consume more food, it accumulates at the higher trophic level in greater amounts. This is called biomagnification. Sea/gulls and birds are the top consumers in an aquatic food chain, they will show the highest accumulation.

DDT (Dichlorodiphenyltrichloroethane) is an organochlorinated compound that is stable in nature. It is highly soluble in the fats of the living organism and so, it shows persistence in the food chain. It is seen that the level of DDT increases as the food chain progresses. It means, the primary consumers will have more DDT concentration than the producers, the secondary consumers will have more than primary consumers and so on. The highest concentrations will be seen in the top carnivore. This is because the consumers at the successive trophic level consume more than the previous level to fulfil the energy requirements. Due to this, DDT keeps on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification.

DDT (Dichlorodiphenyltrichloroethane) is an organochlorinated compound that is stable in nature. It is highly soluble in the fats of the living organism and so, it shows persistence in the food chain. It is seen that the level of DDT increases as the food chain progresses. It means, the primary consumers will have more DDT concentration than the producers, the secondary consumers will have more than primary consumers and so on. The highest concentrations will be seen in the top carnivore. This is because the consumers at the successive trophic level consume more than the previous level to fulfil the energy requirements. Due to this, DDT keeps on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification.

Plants are categorised into three groups based on their uptake of heavy metals - indicator, excluder and hyperaccumulator. Hyperaccumulator is a plant capable of growing in soils with high concentration of metals. They absorb through their roots and concentrate them in their tissues. The concentration is toxic to other species not adapted to grow on such soil. Arabidopsis belonging to the family Brassicaceae is a hyperaccumulator. Hence, the correct answer is 'Arabidopsis'.

DDT (Dichlorodiphenyltrichloroethane) is basically an organochlorine pesticide/insecticide. It was originally used for insecticides to prevent the crop from being damaged by insects, rodent, weeds etc. but due to its harmful effect it has been globally banned by "Stockholm convention on Persistent organic pollutant, 2001". By its nature, it is insoluble in water and shows high solubility in the fat of animals. They do not degrade easily and accumulate within the body of the organism in fat deposited portion. Due to their ability to show the biomagnification.

Biological magnification is also called as biomagnification and bioamplification. It occurs due to the increasing concentration of a toxic substance in the tissues of tolerant organisms that successively move up to higher levels in a food chain. The order of food chain for the given example is water followed by zoo plaktery followed by small fishes and lastly big fishes. It usually increase 2 to 10 folds in a food chain. Hence, the biomagnification of water, that is 0.0003 ppm is too less. Also, biomagnification of small fishes (0.2 ppm) should be ideally more than zoo plaktery (0.4 ppm). Hence, options A, B and D are incorrect. Big fishes having hightest biomagnification, that is 2 ppm.