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

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

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

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

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.

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

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 concentration of DDT is the highest in

Description : The concentration of DDT is the highest in

Last Answer : The concentration of DDT is the highest in A. Primary consumer B. Producers C. Top consumer D. Decomposers

If a lake is contaminated with DDt, its highest concentration would be found in-

Description : If a lake is contaminated with DDt, its highest concentration would be found in-

Last Answer : If a lake is contaminated with DDt, its highest concentration would be found in- A. Primary ... consumer C. Tertiary consumer D. None of these

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 ... C. Liposoluble D. Nontoxic to aquatic animals

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

Because uranium 235 isn't found naturally in large quantities, engineers increase its concentration in nuclear fuel so that a chain reaction is more likely to occur. What is the name of this process?

Description : Because uranium 235 isn't found naturally in large quantities, engineers increase its concentration in nuclear fuel so that a chain reaction is more likely to occur. What is the name of this process?

Last Answer : Enrichment

Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre. (A) 22 (B) 42 (C) 332 (D) 1050

Description : Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre. (A) 22 (B) 42 (C) 332 (D) 1050

Last Answer : (B) 42

Bryophytes are amphibians because (a) they require a layer of water for carrying out sexual reproduction (b) they occur in damp places (c) they are mostly aquatic (d) all the above.

Description : Bryophytes are amphibians because (a) they require a layer of water for carrying out sexual reproduction (b) they occur in damp places (c) they are mostly aquatic (d) all the above.

Last Answer : (a) they require a layer of water for carrying out sexual reproduction

Which is the reason for highest biomass in aquatic ecosystem-

Description : Which is the reason for highest biomass in aquatic ecosystem-

Last Answer : Which is the reason for highest biomass in aquatic ecosystem- A. Nanoplankton, blue green algae, ... molds C. Benthonic and brown algae D. Diatoms

Which is the reason for highest biomass in aquatic ecosystem? (a) Nano plankton, blue green algae and green algae (b) Sea grass and slime moulds (c) Benthic and brown algae (d) Diatoms

Description : Which is the reason for highest biomass in aquatic ecosystem? (a) Nano plankton, blue green algae and green algae (b) Sea grass and slime moulds (c) Benthic and brown algae (d) Diatoms

Last Answer : (c) Benthic and brown algae

Increasing the concentration of accumulated pollutant along food chain is along food chain is

Description : Increasing the concentration of accumulated pollutant along food chain is along food chain is

Last Answer : Increasing the concentration of accumulated pollutant along food chain is along food chain is ... B. Bioaccumulation C. Eutrophication D. Biodiversity

he phenomenon of increase in the concentration of toxic substances at each trophic level in a food chain is called

Description : he phenomenon of increase in the concentration of toxic substances at each trophic level in a food chain is called

Last Answer : biomagnification.

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

For the aquatic organisms, the source of food is – (1) Phytoplankton (2) Sea Weed (3) Aqua plankton (4) Zooplankton

Description : For the aquatic organisms, the source of food is – (1) Phytoplankton (2) Sea Weed (3) Aqua plankton (4) Zooplankton

Last Answer : (4) Zooplankton Explanation: Zooplankton are a type of heterotrophic plankton that range from microscopic organisms to large species, such as jellyfish.

A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Description : A river with an inflow of domestic sewage rich in  organic waste may result in  (a) an increased production of fish due to  biodegradable nutrients (b) death of fish due to lack of oxygen ( ... of the river very soon due to algal bloom (d) increased population of aquatic food web  organisms.

Last Answer : (d) increased population of aquatic food web  organisms.

A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Description : A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Last Answer : (b) death of fish due to lack of oxygen

The length of line measured by 20 m chain was found to be 751 m. The chain was tested before start of measurement and was found correct. The chain was again tested after measurement and was found 6 cm too short. What shall be the correct length of line ?

Description : The length of line measured by 20 m chain was found to be 751 m. The chain was tested before start of measurement and was found correct. The chain was again tested after measurement and was found 6 cm too short. What shall be the correct length of line ?

Last Answer : Given Data: Standard length of chain (L)= 20m Measured Length (M.L.) = 751 m Error before start of measurement = 0.0 Error after measurement = 6 cm = 0.06 m To Find: Actual length or Correct length Solution: ... (L'/L)  = (751) x (19.97/20)  = 749.87 Correct length of line is 749.87 m

The Volume of distribution of a drug administered at a dose of 300 mg and exhibiting 30 microgram/mL instantaneous concentration in plasma shall be (A)10 L (B) 100 L (C) 1.0 L (D) 0.10 L

Description : The Volume of distribution of a drug administered at a dose of 300 mg and exhibiting 30 microgram/mL instantaneous concentration in plasma shall be (A)10 L (B) 100 L (C) 1.0 L (D) 0.10 L

Last Answer : (A)10 L

Epinephrine increases the concentration of free fatty acids in plasma by increasing (A) Extramitochondrial fatty acid synthesis (B) Mitochondrial fatty acid chain elongation (C) Microsomal fatty acid chain elongation (D) Lipolysis in adipose tissue

Description : Epinephrine increases the concentration of free fatty acids in plasma by increasing (A) Extramitochondrial fatty acid synthesis (B) Mitochondrial fatty acid chain elongation (C) Microsomal fatty acid chain elongation (D) Lipolysis in adipose tissue

Last Answer : Answer : D

Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it doesnot entail a chain mechanism.(A) Proportional to(B) Independent of(C) Inversely proportional to(D) Proportional to the square o

Description : Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of ... to (B) Independent of (C) Inversely proportional to (D) Proportional to the square o

Last Answer : (A) Proportional to

For a chain reaction to occur each fission mus produce at least ____more fission reaction?

Description : For a chain reaction to occur each fission mus produce at least ____more fission reaction?

Last Answer : its 1 i think

For a chain reaction occur each fission must produce at least ____more fission reaction?

Description : For a chain reaction occur each fission must produce at least ____more fission reaction?

Last Answer : 1::::: APEX (I Just took the test)

All the following statements about carnitine are true except (A) It can be synthesised in the human body (B) It can be synthesized from methionine and lysine (C) It is required for transport of short chain fatty acids into mitochondria (D) Its deficiency can occur due to haemodialysis

Description : All the following statements about carnitine are true except (A) It can be synthesised in the human body (B) It can be synthesized from methionine and lysine (C) It is required for transport of short chain fatty acids into mitochondria (D) Its deficiency can occur due to haemodialysis

Last Answer : Answer : C

Why is the halogenation of alkanes considered a chain reaction? (a) it occurs quickly. (b) it occurs without the generation of intermediates. (c) each step generates the reactive intermediate that causes the next step to occur. (d) the reaction allows long chains of halogenated alkanes to be formed

Description : Why is the halogenation of alkanes considered a chain reaction? (a) it occurs quickly. (b) it occurs without the generation of intermediates. (c) each step generates the reactive intermediate that causes the next step to occur. (d) the reaction allows long chains of halogenated alkanes to be formed

Last Answer : each step generates the reactive intermediate that causes the next step to occur

Has DDT saved more lives than any other chemical compound?

Description : Has DDT saved more lives than any other chemical compound?

Last Answer : Water is a chemical compound (H2O). I would have to put that ahead of DDT, any day.

What is the full form of 'DDT' ? -How To ?

Description : What is the full form of 'DDT' ? -How To ?

Last Answer : The full form of 'DDT' is Dichlore-diphenyl-trichlore-ethane

Why did the United States ban the use of DDT?

Description : Why did the United States ban the use of DDT?

Last Answer : Why did the United States ban the use of DDT?

What is DDT ? What is the reaction of DDT in human body ?

Description : What is DDT ? What is the reaction of DDT in human body ?

Last Answer : DDT is dichloro diphenyl trichloroethane. It is a pesticide. Used to protect crops from pest infestation. DDT used as a pesticide can enter the human body and cause adverse reactions in the human ... that food can cause skin diseases. . The physical and mental development of the child is impaired

DDT was discovered in how many years ?

Description : DDT was discovered in how many years ?

Last Answer : DDT was discovered in 184 , but its use as a pesticide began in 1939.

What is DDT ?

Description : What is DDT ?

Last Answer : DDT is a household cleaning chemical whose full name is dichloro diphenyl trichloro ethane. One is basically a pesticide. When this toxin, which is soluble in lubricants (ie oils), is touched, the sodium channel of the insects becomes more open and paralysis occurs and the insects die.

Where is DDT used ?

Description : Where is DDT used ?

Last Answer : DDT is used in dry.

What is the full form of DDT ?

Last Answer : The full form of DDT is Dichloro Diphenyl Trichloro-Ethane

Who Discovered DDT ?

Last Answer : Discover DDT (Zidler)

Agricultural use of DDT was banned in India during

Description : Agricultural use of DDT was banned in India during

Last Answer : Agricultural use of DDT was banned in India during A. 1962 B. 1972 C. 1974 D. 1989

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.

Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants

Description : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants

Last Answer : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic ... but reason is wrong D. Both are wrong

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.

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

Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV radiations causes ozone depletion .

Description : Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV radiations causes ozone depletion .

Last Answer : Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV ... D. X is not correct, Y is correct.

Process by which insecticides like DDT reach man is

Description : Process by which insecticides like DDT reach man is

Last Answer : Process by which insecticides like DDT reach man is A. Bioaccumulation B. biomagnification C. Bioremediation D. Eutrophication.

Assertion : Agriculture output increased several times after introduction of DDT. Reason : DDT was the first insecticide used on a wide scale.

Description : Assertion : Agriculture output increased several times after introduction of DDT. Reason : DDT was the first insecticide used on a wide scale.

Last Answer : Assertion : Agriculture output increased several times after introduction of DDT. Reason : DDT was the ... but reason is wrong D. Both are wrong