What happens to the concentration of DDT in each trophic level Mcq?

An example is DDT whose concentration increases at each trophic level.

What happens to the concentration of DDT in each trophic level *?

Solution : DDT concentration continuously increases in successive trophic levels in a food chain. This phenomenon is known as biological magnification or biological amplification.

How does the concentration of DDT change as you move to higher trophic levels?

As the trophic level increases, the concentration of DDT is higher.

What is the concentration of DDT for first trophic level?

Hence, the correct answer is '25 ppm'

What happens to the concentration of DDT in each trophic level 1 point A decreases B increases C remains unchanged D becomes zero?

Hence, the correct answer is 'Increases'.

Increasing concentration of DDT in organisms of a food chain in higher trophic levels is known as

What happens when DDT enters in food chain?

When an animal consumes food having DDT residue, the DDT accumulates in the tissue of the animal by a process called bioaccumulation. The higher an animal is on the food chain (e.g. tertiary consumer such as seals), the greater the concentration of DDT in their body as a result of a process called biomagnification.

What happens to DDT an organic pollutant concentrations as this pesticide gets passed up the food chain?

DDT increases as it moves up a food chain.

What is the impact of DDT on birds and other higher trophic level organisms?

Rather, DDT and its relatives alter the bird's calcium metabolism in a way that results in thin eggshells. Instead of eggs, heavily DDT-infested Brown Pelicans and Bald Eagles tend to find omelets in their nests, since the eggshells are unable to support the weight of the incubating bird.

Is the following in the correct sequence of increasing order of DDT concentration?

Hence, the correct answer is 'Water-0.003ppm, zooplankton- 0.04ppm, small fish-0.5ppm, large fish-2ppm, fish eating birds-25ppm'

What do you notice about the levels of DDT going from water to phytoplankton and on up to Pelicans?

The level of DDT in water is the same but as it goes into phytoplankton and up to pelicans, it started to gradually increase. When toxins increase as you go up the food chain/food web, it is called biomagnification.

Which of the following trophic level has highest concentration of DDT?

Highest concentration of DDT is seen in the tertiary consumers.

Where is the highest concentration of DDT?

The highest amount of DDT and derivatives residues were found in carnivore fish species, C. striatus which is the top predator of food web. In contrast, the lowest residue levels of DDT and derivatives were found in the omnivores, P. gonionotus.

Why does the concentration of toxic substances increase from a lower to a higher trophic level?

As the trophic level increases in a food chain, the amount of toxic build up increases. The x's represent the amount of toxic build up accumulating as the trophic level increases. Toxins build up in organism's fat and tissue. Predators accumulate higher toxins than prey.

Which trophic level is most affected by biomagnification?

In many cases, animals near the top of the food chain are most affected because of a process called biomagnification. Many of the most dangerous toxins settle to the seafloor and then are taken in by organisms that live or feed on bottom sediments.

How did high concentrations of DDT affect bird populations?

The high concentration of DDT interferes with the calcium metabolism of birds and induces eggshell thinning. Premature breakage. This causes the population to decrease. Additional Information: Bald eagle and other bird populations collapsed as DDT thinned their eggs killing their embryos.

What concentration of DDT did the estuary have in it?

In an estuary off Long Island Sound, Rachel Carson learned that in the water the DDT measured only three parts per trillion (that's only 0.000003 ppm!). That was so low that it didn't seem dangerous at all.

How does DDT in the environment affect many birds quizlet?

how does DDT affect animals? for animals, such as birds, it can disturb the reproductive processes, such as thinning the eggshells or lead to imbalances of ions in cells that affects the nervous system in some fish.

What are the effects of DDT?

Following exposure to high doses, human symptoms can include vomiting, tremors or shakiness, and seizures. Laboratory animal studies showed effects on the liver and reproduction. DDT is considered a possible human carcinogen.

What are the effects of DDT on the environment?

DDT's devastating effect on the aquatic environment has been thoroughly studied. Due to it's low solubility, it has a greater rate of bioaccumulation in water, and thus poses a great long-term threat to aquatic wildlife.

How does DDT work as a pesticide?

What is the mechanism of action of DDT? DDT affects the nervous system by interfering with normal nerve impulses (2). DDT causes the nerve cells to repeatedly generate an impulse which accounts for the repetitive body tremors seen in exposed animals (2).

How does concentration of pesticide change once it enters a food chain Class 10?

Answer: The animals tend to eat lots of organisms from the level below in food chains, the concentration of pesticide in the bodies of organisms increases at higher levels of food chains. This can result in the toxicity of the pollutant reaching fatal levels in the organisms at the top of the food chain.

What does DDT stand for?

DDT (dichloro-diphenyl-trichloroethane) was developed as the first of the modern synthetic insecticides in the 1940s.

Which trophic level in the given pyramid has lowest and highest concentration of chemical pollutants?

Answer. the last trophic level of a food chain has the highest concentration of toxic substances.

What is it called when concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web?

The term food web biomagnification is used to describe trophic enrichment of contaminants within food webs and refers to the progressive increase in chemical concentrations with increasing animal trophic status.

Is a toxin being more concentrated at higher trophic levels?

Organisms at higher trophic levels tend to eat a larger proportion of their own weight in food, which means that they have a greater risk of being exposed to and concentrating biological toxins within their tissues.