BIOMAGNIFICATION...

BIOMAGNIFICATION

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Biomagnification is the increase in concentration of a pollutant that is non-biodegradable in each higher trophic level of a food chain. Example : DDT and Mercury.

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GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS|Exercise SECTION - II (ZOOLOGY)|26 Videos
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Math the following Columns. {:("Column I","Column II"),("A. Eutrophication","1. Rise in sea level"),("B. Biomagnification","2. Water hyacinth"),("C. Terror of Bengal","3. Increase of quantity of pollutant at successive trophic levels"),("D. Greenhouse effect","4. Enrichment with nutrients"):}

How many statements are correct ? a. Biomagnification is the natural ageing of a lake by nutrient enrichment of its water b. After CFC, methane is a major cause of greenhouse effect c. Ozone is a secondary pollutant in troposphere d. The thickness of the ozone is measured in Dobson unit

Which of the following statements is not correct regarding biomagnification ? (i) Mercury accumulated by an organism cannot be metabolised. (ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels. (iii) Accumulation of cadmimu can cause thinning of egg shell in birds. (iv) DDT accumulation is a major cause of reduced population of fish eating birds. (v) Biomagnification occurs only in aquatic food chain.

Select the correct statement . (A) use of incinerators is crucial to the disposal of hospital waste . (B) Recycling is the only solution for the treatment of e-waste . (C) Fish-eating birds containing 2 ppm DDT become agents of biomagnifications. (D) polyblend is a fine powder of bitumen .

Which is correct matched ? 1. Arsenic poisoning -Black foot disease. 2. Secondary Effluent treatment-Biological process. 3. Pyrolysis -Solid soil waste disposal. 4. Tubifex -Water pollution indicator. 5. Biomagnification -Degradable pollutants.

Main objective of production/use of herbicide resistant GM crops is to A - Reduce herbicide accumulation in food articles for health safety. B - Eliminate weeds in the field without the use of herbicides C - Eliminate weeds from the field without the use of manual labour. D - Soil pollution and biomagnification caused by herbicides. Which of the following statements are correct?

Create an aquatic food chain in a water body into which effluents flow from a pesticide factory. Diagrammatically represent and answer the following questions : (i) What is the phenomenon called? (ii) Explain biomagnification of pesticide.

GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS- MARCH 2014-SECTION - II (ZOOLOGY)

BIOMAGNIFICATION
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