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
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.
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
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
Last Answer : DDT residues are rapidly passed through food chain causing biomagnification because DDT is A. Water ... toxic D. Non-toxic to aquatic animals
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
Description : The highest DDT concentration in aquatic food chain shall occur in (a) phytoplankton (b) seagull (c) crab (d) eel.
Last Answer : (b) seagull
Last Answer : b) seagull
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
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
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).
Description : DDT is prepared by the reaction of chlorobenzene with (in the presence of conc. H2SO4) (a) Chloral (b) Chlorine (c) Chloroform (d) Carbon tetrachloride
Last Answer : Chloral
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.
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
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
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
Description : A lake which is rich in organic waste may result in (a) increased population of aquatic organisms due to minerals (b) drying of the lake due to algal bloom (c) increased population of fish due to lots of nutrients (d) mortality of fish due to lack of oxygen.
Last Answer : (d) mortality of fish due to lack of oxygen.
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.
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
Description : Maximum DDT is present in birds feeding on
Last Answer : Maximum DDT is present in birds feeding on A. Fishes B. Meat C. Insects D. Seeds
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
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.
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
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
Description : If a spinster staring from rest has acceleration of 5 m s-2 during 1st 2.0 s of race then her velocity after 2 s is A. 20 m s-1 B. 10 m s-1 C. 15 m s-1 D. 5 m s-1
Last Answer : 10 m s-1
Description : A major cause of mortality of many birds visitors of aquatic habitat is
Last Answer : A major cause of mortality of many birds visitors of aquatic habitat is A. Nutrient enrichment B. Lead poisoning C. Salt enrichment D. All the above
Description : Aquaculture facilities cultivate approximately ____ different species of fish and shellfish and grow a variety of aquatic plants. a. 20 c. 10 b. 30 d. 40
Last Answer : b. 30
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
Description : Put these in decimal order 22.2,-0.2,2.02 staring with the smallest?
Last Answer : -0.2
Last Answer : Sea fish are high in iodine
Description : How many animals in the given list have gills for respiration ? Earthworm , Frog, Fish, Insects, Reptiles, Aquatic arthropods, Flatworm, Molluscs, Bir
Last Answer : How many animals in the given list have gills for respiration ? Earthworm , Frog, Fish, Insects, Reptiles, ... A. Six B. Four C. Three D. Five
Description : Aquatic animal with the most developed intelligence is – (1) Shark (2) Whale (3) Flying fish (4) Sea horse
Last Answer : (1) Shark Explanation: In terms of brain shape, the shark brain differs a lot from that of mammals and birds. However, in proportion to the body size shark brains usually are similar sized or ... seem to be as intelligent as mammals such as dogs, which is really impressive for a non-tetrapod.
Description : What is true about Nereis, scorpion, cockroach and silver fish? (a) They all possess dorsal heart. (b) None of them is aquatic. (c) They all belong to the same phylum. (d) They all have jointed paired appendages.
Last Answer : (a) They all possess dorsal heart.
Description : Aquatic animal with the most developed intelligence is (1) Shark (2) Whale (3) Flying fish (4) Sea horse
Last Answer : Shark
Description : Electrical machines having power outputs ranging from a few kW upto approximately 250 kW may be classified as (a) small size machines (b) medium size machines (c) large size machines (d) any ofthe above
Last Answer : (b) medium size machines
Description : Electrical machines having a power output upto about 750 W may be called_______machines. (a) small size (b) medium size (c) large size (d) any of the above
Last Answer : (a) small size
Description : Upto what value of 'Mach number', a fluid may be considered as incompressible? (A) 0.03 (B) 0.3 (C) 3 (D) 10
Last Answer : (D) 10
Description : What would you say people think about when you catch them staring at you?
Last Answer : answer:Who knows? There are about a million reasons someone might stare at another person. There’s no way for any of us to know what is going on in the mid of someone else. Why not throw them an annoyed “can I help you?” and find out for yourself why they’re doing it?
Description : Does a dog's single blinking, nodding and staring mean anything?
Last Answer : If it’s a bitch it means she likes cock!
Description : Is there a scientific explanation for how we can feel someone staring at us?
Last Answer : Well, I'd argue the whole brain is designed to keep us a live. We're built to determine within a quick second whether we are attracted to someone, or fear them. Should we fear ... and might like it, and therefore stay in the vicinity. The hypothalamus controls our initial emotional disbursements.
Description : When you stare someone in the face... where exactly are you staring?
Last Answer : I have a tendency to go straight for the right eye, then I just look all around and back to the eyes.
Description : Do you want to spend the rest of your life staring at a box?
Last Answer : Well I only spend about 3 hours starting at a computer screen at work so that’s good at least – other times I don’t feel it’s a waste of time most of the time. The key is to not think technology is the enemy and to not let it rule your life either.
Description : What well-paid careers don't have much bodily risk but no/minimal staring at screens?
Last Answer : Being born rich.
Description : Two women sit staring and glaring at each other across a small table. Although the two women don't appear to be friendly toward each other, they do eventually hold each other's hands. A man approaches, puts ... is the word the man shouts to the women, and what in the world is going on here? -Riddles
Last Answer : The word the man shouts to the women is, 'Go!' This is the way most women's arm wrestling competitions start, and hopefully the wrist straps, to keep their hands from slipping apart, won't have to be used.
Description : What animal is it the hardest to have a staring contest with? -Riddles
Last Answer : A fish. They cannot blink!
Description : How to get rid off the fear of being killed or harmed i live in a bad neighbor there known as drug dealers they killed a cop before yet now they been staring at me when ever i walk they keep gossiping i ignore them but this make me scared?
Last Answer : fearing electrical wire
Description : What is the average staring salary for an mri tech?
Last Answer : There are a lot of factors that depend on a good salary. Starting from 30,000$ to 50,000$, the average salary depends on the skill and experience in the industry.
Description : Which motor has high Starting Torque and Staring current DC motor, Induction motor or Synchronous motor?
Last Answer : DC Series motor has high starting torque. We can not start the Induction motor and Synchronous motors on load, but can not start the DC series motor without load.