DDT residues are rapidly passed through food chain causing biomagnification because DDT is

DDT residues are rapidly passed through food chain causing biomagnification because DDT is
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DDT residues are rapidly passed through food chain causing biomagnification because DDT is A. Water ... C. Liposoluble D. Nontoxic to aquatic animals
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DDT residues are rapidly passed through food chain causing biomagnification because DDT is

Description : DDT residues are rapidly passed through food chain causing biomagnification because DDT is

Last Answer : DDT residues are rapidly passed through food chain causing biomagnification because DDT is A. Water ... toxic D. Non-toxic to aquatic animals

DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Description : DDT residues are rapidly passed through food chain  causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Last Answer : (d) lipo soluble.

DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Description : DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble.

Last Answer : (d) lipo soluble.

Find the correct order of biomagnification of DDT in an aquatic food chain:

Description : Find the correct order of biomagnification of DDT in an aquatic food chain:

Last Answer : Find the correct order of biomagnification of DDT in an aquatic food chain: A. Water -0.003 ppm, zooplankton ... fish -0.04 ppm, large fish -2.5 ppm

Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto:

Description : Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto:

Last Answer : Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in ... B. 50 ppm C. 25 ppm D. 2 ppm

10.Biomagnification of DDT in an aquatic food chain staring from water having conc.of 0.003ppb may go in fish eating birds upto

Description : 10.Biomagnification of DDT in an aquatic food chain staring from water having conc.of 0.003ppb may go in fish eating birds upto (a)2ppm (b)25ppm (c)50ppm (d)100ppm

Last Answer : ANS.(B) 25ppm

Biomagnification of DDT causes decline in bird population by:

Description : Biomagnification of DDT causes decline in bird population by:

Last Answer : Biomagnification of DDT causes decline in bird population by: A. Bringing disturbance in calcium methabolism ... breaking of eggs D. All the above

Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of egg shell and their premature breaking b

Description : Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of egg shell and their premature breaking b

Last Answer : Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of ... and Reason are false, then mark (4).

Ultraviolet light can damage a DNA strand causing (A) Two adjacent purine residue to form a covalently bounded dimer (B) Two adjacent pyrimidine residues to form covalently bonded dimer (C) Disruption of phosphodiesterase linkage (D) Disruption of non-covalent linkage

Description : Ultraviolet light can damage a DNA strand causing (A) Two adjacent purine residue to form a covalently bounded dimer (B) Two adjacent pyrimidine residues to form covalently bonded dimer (C) Disruption of phosphodiesterase linkage (D) Disruption of non-covalent linkage

Last Answer : Answer : B

The concentration of DDT in the food chain, from lower to higher trophic levels:

Description : The concentration of DDT in the food chain, from lower to higher trophic levels:

Last Answer : The concentration of DDT in the food chain, from lower to higher trophic levels: A. ... Decreases C. Increases or decreases D. Remains constant

The concentration of DDT in the food chain, from lower to higher trophic levels:

Description : The concentration of DDT in the food chain, from lower to higher trophic levels:

Last Answer : The concentration of DDT in the food chain, from lower to higher trophic levels: A. Remain same B. Decreases in glaciers C. Increases D. Unpredictable

The highest DDT concentration in aquatic food chain shall occur in:

Description : The highest DDT concentration in aquatic food chain shall occur in:

Last Answer : The highest DDT concentration in aquatic food chain shall occur in: A. Phytoplankton B. Sea gull/birds C. Crab D. Eel

The highest DDT concentration in aquatic food chain shall occur in (a) phytoplankton (b) seagull (c) crab (d) eel.

Description : The highest DDT concentration in aquatic food  chain shall occur in (a) phytoplankton (b) seagull (c) crab (d) eel.

Last Answer :  (b) seagull

The highest DDT concentration in aquatic food chain shall occur in (a) phytoplankton (b) seagull (c) crab (d) eel.

Description : The highest DDT concentration in aquatic food chain shall occur in (a) phytoplankton (b) seagull (c) crab (d) eel.

Last Answer : b) seagull

Insulin is made up of (A) A single polypeptide chain having 51 amino acid residues (B) A single polypeptide chain having 84 amino acid residues (C) A-chain having 21 and B-chain having 30 amino acid residues (D) A-chain having 30 and B-chain having 21 amino acid residues

Description : Insulin is made up of (A) A single polypeptide chain having 51 amino acid residues (B) A single polypeptide chain having 84 amino acid residues (C) A-chain having 21 and B-chain having 30 amino acid residues (D) A-chain having 30 and B-chain having 21 amino acid residues

Last Answer : Answer : C

In glycoproteins, carbohydrate residues are attached to which group of the polypeptide chain?

Description : In glycoproteins, carbohydrate residues are attached to which group of the polypeptide chain?

Last Answer : Hydroxyl group of serine or threonine.

Whichof the following appeared to be with a significant potential for accumulation through food chains? (1) DDT (2) Parathion (3) Lindane (4) Carbary

Description : Whichof the following appeared to be with a significant potential for accumulation through food chains? (1) DDT (2) Parathion (3) Lindane (4) Carbary

Last Answer : (1) DDT Explanation: Mercury and DDT are two persistent toxic materials that accumulate in the food chain and damage the organisms in it. DDT is an insecticide that can pass up the food chain from insects to ... birds, and then from the small birds to birds of prey. It is now banned because of this.

Which of the following appeared to be with a significant potential for accumulation through food chains ? (1) DDT (2) Parathion (3) Lindane (4) Carbary

Description : Which of the following appeared to be with a significant potential for accumulation through food chains ? (1) DDT (2) Parathion (3) Lindane (4) Carbary

Last Answer : DDT

Polymerase chain reaction can rapidly amplify DNA sequences of the size (A) Upto 10 kilobases (B) Upto 45 kilobases (C) Upto 100 kilobases(D) Upto 1,000 kilobases

Description : Polymerase chain reaction can rapidly amplify DNA sequences of the size (A) Upto 10 kilobases (B) Upto 45 kilobases (C) Upto 100 kilobases(D) Upto 1,000 kilobases

Last Answer : Answer : A

What is biomagnification?

Description : What is biomagnification?

Last Answer : Biomagnification is the process by which pollutants become more concentrated as they move up the food chain, and is an important concept in environmental science and toxicology.

What is biomagnification?

Description : What is biomagnification?

Last Answer : A: Biomagnification is the process by which the concentration of a pollutant or toxin increases as it moves up the food chain, often leading to harmful effects in top predators.

What is Biomagnification ?

Description : What is Biomagnification ?

Last Answer : Biomagnification Simply put, the activities that pollute the environment around us are the result of the animals around us eating the toxins. When we hunt and eat that animal, the toxins are entering our ... eat the polluted water. After that we will eat those fish again. This will make us sick.

If a water body is contaminated with toxicant , its biomagnification will be more marked in

Description : If a water body is contaminated with toxicant , its biomagnification will be more marked in

Last Answer : If a water body is contaminated with toxicant , its biomagnification will be more marked in A. Plankton B. Small fish C. Birds D. Water

Biomagnification is highest in

Description : Biomagnification is highest in

Last Answer : Biomagnification is highest in A. Primary consumers B. Secondary consumer C. Producers D. Consumers.

The term biomagnification refers to:

Description : The term biomagnification refers to:

Last Answer : The term biomagnification refers to: A. Rapid growth growth to excessive intake of nutrients B ... pollutants as they pass through food chain.

Algal bloom results from – (1) Global warming (2) Salination (3) Eutrophication (4) Biomagnification

Description : Algal bloom results from – (1) Global warming (2) Salination (3) Eutrophication (4) Biomagnification

Last Answer : (3) Eutrophication Explanation: An algal bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and are recognized by the discoloration in the ... body with nutrients, usually with an excess amount of nutrients. This is known as eutrophication.

Increase in concentration of the toxicant at successive trophic levels is known as (a) biotransformation (b) biogeochemical cycling (c) biomagnification (d) biodeterioration.

Description : Increase in concentration of the toxicant at  successive trophic levels is known as (a) biotransformation  (b) biogeochemical cycling (c) biomagnification (d) biodeterioration.

Last Answer : (c) biomagnification

Increase in concentration of the toxicant at successive trophic levels is known as (a) biotransformation (b) biogeochemical cycling (c) biomagnification (d) biodeterioration.

Description : Increase in concentration of the toxicant at successive trophic levels is known as (a) biotransformation (b) biogeochemical cycling (c) biomagnification (d) biodeterioration.

Last Answer : (c) biomagnification

Breeding of crops with high levels of minerals, vitamins and proteins is called (a) somatic hybridisation (b) biofortification (c) biomagnification (d) micropropagation.

Description : Breeding of crops with high levels of minerals, vitamins and proteins is called (a) somatic hybridisation (b) biofortification (c) biomagnification (d) micropropagation.

Last Answer : (b) biofortification

Pheretima posthuma is highly useful as (a) their burrows make the soil loose (b) they make the soil porous, leave their castings and take organic debris in the soil (c) they are used as fish meal (d) they kill the birds due to biomagnification of chlorinated hydrocarbons.

Description : Pheretima posthuma is highly useful as (a) their burrows make the soil loose (b) they make the soil porous, leave their castings and take organic debris in the soil (c) they are used as fish meal (d) they kill the birds due to biomagnification of chlorinated hydrocarbons.

Last Answer : (b) they make the soil porous, leave their castings and take organic debris in the soil

1. Bird population is seen to decrease due to thinning of egg shells which is caused by : a) Eutrophication b) Biomagnification c) Greenhouse Effect d) Ozone depletion

Description : 1. Bird population is seen to decrease due to thinning of egg shells which is caused by : a) Eutrophication b) Biomagnification c) Greenhouse Effect d) Ozone depletion

Last Answer : d) Ozone depletion

Which of the following exhibits Biomagnification?

Description : 5 Which of the following exhibits Biomagnification? a. SO2 b. mercury c. DDT d. both b and c

Last Answer : Ans. d both b and c

Algal bloom results in a) Global warming b) Salination c) Eutrophication d) Biomagnification

Description : Algal bloom results in a) Global warming b) Salination c) Eutrophication d) Biomagnification

Last Answer : c) Eutrophication

Biomagnification means increase in the (A) concentration of pollutants in living organisms (B) number of species (C) size of living organisms (D) biomass

Description : Biomagnification means increase in the (A) concentration of pollutants in living organisms (B) number of species (C) size of living organisms (D) biomass 

Last Answer : (A) concentration of pollutants in living organisms 

Algal bloom results from (1) Global warming (2) Salination (3) Eutrophication (4) Biomagnification

Description : Algal bloom results from (1) Global warming (2) Salination (3) Eutrophication (4) Biomagnification

Last Answer : Eutrophication 

Which of the following metals contribute to to biomagnification problem in the ecosystem ? (1) Mercury (2) Chromium (4) Copper (4) Lead

Description : Which of the following metals contribute to to biomagnification problem in the ecosystem ? (1) Mercury (2) Chromium (4) Copper (4) Lead

Last Answer : Mercury

Now-a-days use of DDT as insecticide is banned because

Description : Now-a-days use of DDT as insecticide is banned because

Last Answer : Now-a-days use of DDT as insecticide is banned because A. It is less effective than other pesticides ... is vary high D. It has long residual effect.

In an area where DDT had been used extensively, the population of birds declined significantly because:

Description : In an area where DDT had been used extensively, the population of birds declined significantly because:

Last Answer : In an area where DDT had been used extensively, the population of birds declined significantly because: A. ... birds D. Many bird eggs did not hatch.

DDT has been a major pollutant because it

Description : DDT has been a major pollutant because it

Last Answer : DDT has been a major pollutant because it A. Kills aquatic animals B. Kills pests C. Destroy many valuable species D. Is nondegradable

In an area where DDT had been used extensively, the population of birds declined significantly because:

Description : In an area where DDT had been used extensively, the population of birds declined significantly because:

Last Answer : In an area where DDT had been used extensively, the population of birds declined significantly ... eggs D. Earthworms in the area got eradicated

In an area where DDT had been used extensively, the population of birds declined significantly because:

Description : In an area where DDT had been used extensively, the population of birds declined significantly because:

Last Answer : In an area where DDT had been used extensively, the population of birds declined significantly because: ... did not hatch D. Birds stopped laying eggs

In India it is found recently that incidence of Malaria is increasing because (a) The mosquitoes have become DDT resistant (b) Of poverty in villages (c) Of poor sanitary conditions (d) On account of increase in population it has become impossible to maintain cleanliness everywhere

Description : In India it is found recently that incidence of Malaria is increasing because (a) The mosquitoes have become DDT resistant (b) Of poverty in villages (c) Of poor sanitary conditions (d) On account of increase in population it has become impossible to maintain cleanliness everywhere

Last Answer : Ans:(a)

In an area where DDT had been used extensively, the population of birds declined significantly because (a) birds stopped laying eggs (b) earthworms in the area got eradicated (c) cobras were feeding exclusively on birds (d) many of the birds eggs laid, did not hatch.

Description : In an area where DDT had been used extensively, the  population of birds declined significantly because (a) birds stopped laying eggs (b) earthworms in the area got eradicated (c) cobras were feeding exclusively on birds (d) many of the birds eggs laid, did not hatch.

Last Answer : (d) many of the birds eggs laid, did not hatch.

In an area where DDT had been used extensively, the population of birds declined significantly because (a) birds stopped laying eggs (b) earthworms in the area got eradicated (c) cobras were feeding exclusively on birds (d) many of the birds eggs laid, did not hatch

Description : In an area where DDT had been used extensively, the population of birds declined significantly because (a) birds stopped laying eggs (b) earthworms in the area got eradicated (c) cobras were feeding exclusively on birds (d) many of the birds eggs laid, did not hatch

Last Answer : (d) many of the birds eggs laid, did not hatch.

74. In an area where DDT had been used extensively, the population of birds declined significantly because (1) Many of the birds eggs laid, did not hatch (2) Birds stopped laying eggs (3) Earthworms in the area got eradicated (4) Cobras were feeding exclusively on birds

Description : 74. In an area where DDT had been used extensively, the population of birds declined significantly because (1) Many of the birds eggs laid, did not hatch (2) Birds stopped laying eggs (3) Earthworms in the area got eradicated (4) Cobras were feeding exclusively on birds

Last Answer : Cobras were feeding exclusively on birds

The main purpose of control rod in a nuclear reactor is to control the (A) Chain reaction and hence the power output by regulating the number of secondary neutrons causing fission (B) Emission of hazardous radiation (C) Conversion of fissile material into fertile material (D) Velocity of the secondary neutrons

Description : The main purpose of control rod in a nuclear reactor is to control the (A) Chain reaction and hence the power output by regulating the number of secondary neutrons causing fission (B) ... radiation (C) Conversion of fissile material into fertile material (D) Velocity of the secondary neutrons

Last Answer : (A) Chain reaction and hence the power output by regulating the number of secondary neutrons causing fission

The codons causing chain termination are (a) AGT, TAG, UGA (b) UAG, UGA, UAA (c) TAG, TAA, TGA (d) GAT, AAT, AGT

Description : The codons causing chain termination are (a) AGT, TAG, UGA (b) UAG, UGA, UAA (c) TAG, TAA, TGA (d) GAT, AAT, AGT

Last Answer : (b) UAG, UGA, UAA

The codons causing chain termination are (a) AGT, TAG, UGA (b) UAG, UGA, UAA (c) TAG, TAA, TGA (d) GAT, AAT, AGT

Description : The codons causing chain termination are (a) AGT, TAG, UGA (b) UAG, UGA, UAA (c) TAG, TAA, TGA (d) GAT, AAT, AGT

Last Answer : b) UAG, UGA, UAA

Pick out the wrong statement. (A) DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction (B) Chloral is obtained by the chlorination of ethyl alcohol (C) Insecticides acting on the insects through the respiratory system are called fumigants (D) Benzene hexachloride is not a contact insecticide

Description : Pick out the wrong statement. (A) DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction (B) Chloral ... through the respiratory system are called fumigants (D) Benzene hexachloride is not a contact insecticide

Last Answer : (D) Benzene hexachloride is not a contact insecticide

Buffering action of haemoglobin is mainly due to its (A) Glutamine residues (B) Arginine residues (C) Histidine residues (D) Lysine residues

Description : Buffering action of haemoglobin is mainly due to its (A) Glutamine residues (B) Arginine residues (C) Histidine residues (D) Lysine residues

Last Answer : Answer : C