Definition of Biomagnification

Q.

2(iii) What are the ill effects of water logging ?

Q. The accumulation of non-biodegradable pesticides in the food chain in increasing amounts at each higher trophic level is known as:

1. Pollution
2. Eutrophication
3. Decomposition
4. Biomagnification

Q.

Maximum DDT will occur in

1. Phytoplankton

2. crab

3. eel

4. seagull

Q. Match the items in column $I$ and column $II$ and choose the correct option :

Column $I$	Column $II$
$A.$ UV	$i.$ Biomagnification
$B.$ Biodegradable organic matter	$ii.$ Eutrophication
$C.$ DDT	$iii.$ Snow blindness
$D.$ Phosphates	$iv.$ BOD

The correct match is:

Q. Biomagnification is:

1. Amount of CO inseparably combined with haemoglobin
2. Increase in pollutants at successive trophic levels
3. Rate of increase of biomass
4. Nutrient enrichment of a water body

Q. _____ is the increase in concentration of pollutants at successively higher levels in a food chain.

1. ​Biomagnification
2. Eutrophication
3. Bioaccumulation
4. Flooding

Q. How pesticides, herbicides and fungicides are affecting the ecosystems? Explain about bioaccumulation and biomagnification with examples.

Q.

What do you understand by the term Biological magnification"?

Q.

What is bio-magnification?

Q. Do the plants that absorb contaminants such as heavy metals(phytoremediation) lead to biomagnification?

Q. Which of the following organism is likely to have more concentration of D.D.T in its body?

1. Herbivores
2. Carnivores
3. Top carnivores
4. Primary producers

Q. Do the plants that absorb contaminants such as heavy metals (phytoremediation) lead to biomagnification?

Q. Select the right option which is represented by ’I’ in the given image.

1. Eutrophication
2. Biomagnification
3. Fertilisers
4. Insecticides

Q. The bio accumulation of pesticides in birds leads to

1. Weakening of nest
2. Loss of feather colour
3. Egg shell thinning
4. Failure of migration

Q. The accumulation of non-biodegradable substances in a food chain in increasing amount at each higher trophic level is known as _____________.

1. Accumulation
2. Eutrophication
3. Pollution
4. Bio magnification

Q. Select the right option which is represented by ’I’ in the given image.

1. Insecticides
2. Eutrophication
3. Biomagnification
4. Fertilizers

Q. Which process leads to the accumulation of toxicants in higher trophic levels?

1. Global warming
2. Deforestation
3. Eutrophication
4. Biomagnification

Q. State whether true or false:
Accumulated heavy metals cannot be metabolised by organisms.

1. True
2. False

Q. What is bioaccumulation?

Q. Which of the following is correct about the synergistic?

1. Toxic substance made worse by presence of non toxic substance
2. Combined effect of pollutants is the same as the sum of effects of individual pollutants
3. Combined effect of pollutants is worse than the simple sum of effects of individual pollutants
4. Effect of toxic substance lessened by presence of non-toxic substance

Q. why does the entropy of a boiled egg increase?

Q. In human body, chlorinated hydrocarbons accumulate in

1. Bones
2. Brain
3. Fatty tissue
4. Skin

Q. The process by which nutrient chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil called as

1. Mulching
2. Incineration
3. Desertification
4. Leaching

Q. With the help of a flow chart, show the phenomenon of biomagnification of DDT in an aquatic food chain. [3]

Q. Increase in concentration of the toxicant at successive trophic levels is known as :

1. Biogeochemical cycling
2. Biomagnification
3. Biotransformation
4. Biodeterioration

Q. State whether true or false:
Accumulated heavy metals cannot be metabolised by organisms.

1. True
2. False

Q. What is biomagnification?

1. None of the above
2. Increase in biomass as we go up the trophic level
3. Increase in concentration of a toxic substance as they go up the trophic level
4. Increase in different organ system as we go up the trophic level

Q. Drinking mineral water/aerated drink with low levels $(\sim 0.02$ ppm) of pesticide for long period would

1. Pesticide accumulation in the body
2. Cause cancer of intestine
3. Cause leukaemia
4. Produce immunity against mosquito