Bioaccumulation and Biomagnification

Q.

Which is the largest saltwater lake in India?

Q. Minamata disease was caused due to the consumption of:

1. Sea food containing lots of cadmium
2. Fish contaminated with mercury
3. Oysters with lots of pesticides
4. Sea food contaminated with selenium

Q. The largest freshwater lake in India is

1. Chilka lake
2. Kolleru lake
3. Wular lake
4. None of the above

Q.

The most common pesticide used in India is

1. (a) Baygon

2. (b) BHC

3. (c) DDT

4. (d) Endrin

Q. Which of the following statements best describes the cause of Minamata disease due to the release of effluents from the Chisso Corporation.

Statement 1: People regularly included fish from the Minamata bay in their daily diet.

Statement 2: The waste generated from the factory contaminated all the fishes in the bay.

1. Only statement 1
2. Only statement 2
3. Both statement 1 and 2
4. Neither statement 1 or 2

Q.

Pls help me with the following :

Define the following

1. Eutrophication

2. Biomagnification

3. Acid rain

4. Ozone depletion

5. Green house effect

Q.

Why in an aquatic food chain, maximum DDT is found in fish-eating birds?

Q.

Which of the following is not the characteristic of food chain?

1. 3 to 4 trophic levels present

2. Energy flow is multi directional

3. Bio-magnification of harmful chemicals

4. Green plants are the producers

Q.

Minamata disease is caused due to presence of ______ in water.

Q. What are the characteristics of a polluted lake?

1. Low dissolved oxygen
2. Clear
3. High biochemical oxygen demand
4. Turbid

Q. The increase in concentration of a chemical in organisms as we move from lower to higher trophic levels is called .

1. eutrophication
2. biomagnification
3. BOD

Q. Arrange the following organisms in increasing order of biomagnificaion.

1. Zooplankton
2. Algae
3. Small fish
4. Large fish
5. Birds

Q. Arrange the following options in ascending order of their BOD value:

(I) Sample of highly polluted pond water
(II) Sample of unpolluted pond water
(III) Distilled water

1. III - I - II
2. II - III - I
3. III - II - I
4. I - III- II

Q. Biomagnification refers to an increase in the concentration of the toxicant at successive trophic levels. This happens because

1. A toxic substance accumulated by an organism cannot be excreted
2. A toxic substance gets passed on to the next higher trophic level
3. All of the above
4. A toxic substance accumulated by an organism cannot be metabolised

Q. Concentration of DDT is highest in:

1. Primary consumer
2. Producers
3. Top consumer
4. Decomposers

Q.

Areas in the ocean with low oxygen concentration that causes suffocation and death of animal life.

1. Whirlpool

2. Seabed

3. Blackwater

4. Dead Zone

Q. Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

1. Petroleum industry
2. Sugar industry
3. Domestic sewage
4. Dairy industry

Q.

Which of the following statement(s) is/are false with regards to excessive usage of fertilisers?

1. They are eco-friendly.
2. They improve the quality of groundwater.
3. They adversely affect the useful component of the soil.
4. They reduce the self regeneration capacity of the soil.

Q. Disease caused by eating fish inhabiting mercury contaminated water is
(a) bright's disease
(b) minimata disease
(c) hashimoto's disease
(d) osteosclerosis

Q. The use of DDT is banned now-a-days because it is

1. Very costly
2. Not available
3. Inflammable
4. Not degraded easily

Q. Increase in the concentration of pollutants (toxicant) in higher trophic levels is called:

1. Recycling
2. Eutrophication
3. Biodegradation
4. Biomagnification

Q. By which of the following phenomena DDT could be accumulated in the human beings:

1. Bioaccumulation
2. Bioremediation
3. Biomagnification
4. Eutrophication

Q. Pesticides sprayed in the environment can threaten predators in the area, this can cause

1. Global warming
2. Acid rain
3. Eutrophication of lakes
4. Magnification in the food chain
5. Depletion of the ozone layer

Q. Detergents are water pollutants because they contain.

1. Nitrates
2. Phosphates
3. Carbonates
4. Sulphates

Q.

Which of the following constitute a food chain?

1. Human, goat, fish

2. Plants, deer, goat

3. Plants, goat, human

4. Plants, mango, goat

Q. Explain the case study of Kolleru lake. [4 Marks]

Q. As DDT passes into food chain, the concentration:

1. Increases
2. Remains same
3. Decreases
4. Unpredictable

Q. The bioaccumulation of heavy metals in fishes can be evaluated by measuring the levels of ___.

1. vitamins and lipids
2. lipids and carbohydrates
3. glycogen and lipids
4. carbohydrates and vitamins

Q. Which of the following causes bio-magnification?

1. Both (b) and (c)
2. ${SO}_2$
3. Mercury
4. DDT

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