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Physics, Chemistry and Biology: Post your doubts here!

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describe negative feedback briefly, please:D
A change that acts oppositely to an ongoing process. For eg, if your blood glucose levels are rising, your body will try to cause a change that will make the rising blood glucose fall........... thus pancreas release insulin to convert the glucose for storage as glycogen............
 
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A change that acts oppositely to an ongoing process. For eg, if your blood glucose levels are rising, your body will try to cause a change that will make the rising blood glucose fall........... thus pancreas release insulin to convert the glucose for storage as glycogen............
oh again i didnt see..........someone replied already.......... how is this site//////// doesnt show latest msgs :p
 
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can anyone explain me what's the difference bw practical and experimental sources of improvements and inaccuracies?...............
 
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can anyone explain me what's the difference bw practical and experimental sources of improvements and inaccuracies?...............
Practical errors are basically those involved while setting up the apparatus. eg. not connecting wires properly to battery
Experimental involve those
Determinate (Systematic) Error
Indeterminate (Random) Errors
And personal carelessness
 
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as salam o alaikum
hi guys!!
some more silly questions:
1) in the future the extraction of mineral resources in the antartic might occur on a large scale. This could destroy the breeding grounds of the ross seal.
(i) state and explain what effects this might have on the population of Leopard seal??
(ii)State and explain what effect this might have on the population of fish???

2) suggest what causes cloud formation??
3) describe the role of nitrifying bacteria in the nitrogen cycle??
4)MAY/JUNE 2013 P32 QUESTION NO 2 !!!
plz answer thx a lot!!
 
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whats osmoregulation, pls rep quick
Osmoregulation is the active regulation of the osmotic pressure of an organism's fluids to maintain the homeostasis of the organism's water content; that is, it keeps the organism's fluids from becoming too diluted or too concentrated. Osmotic pressure is a measure of the tendency of water to move into one solution from another by osmosis. The higher the osmotic pressure of a solution, the more water tends to move into it. Pressure must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water by osmosis from the side containing pure water.
 
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Osmoregulation is the active regulation of the osmotic pressure of an organism's fluids to maintain the homeostasis of the organism's water content; that is, it keeps the organism's fluids from becoming too diluted or too concentrated. Osmotic pressure is a measure of the tendency of water to move into one solution from another by osmosis. The higher the osmotic pressure of a solution, the more water tends to move into it. Pressure must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water by osmosis from the side containing pure water.
Oye, Wikipedia hai kya tu ? :p
 
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