Why wouldn't it be safe to drink water from a pond? What about the protist do they have aything to do with it?
87710
Depends on where the pond is. Provided the pond hasn't been polluted it is perfectly safe to drink the water from the pond. Where do you think people got their drinking water before electric water pumps were invented? From wells and bores and creeks and.... ponds.\n\n\nIf the pond has been polluted there are any number of reasons it wouldn't be safe to drink, but they all come under either biological or chemical pollutuants. \n\nChemical pollutants could be anything from pesticides to heavy metals from the rocks the water has flowed over to chemcals from surrounding plant life.\n\nBiological pollutants can be pretty much anyhting from viruses and bacteria from human or animal faeces through to fungi and worms that livein the water as part of their natural lifecyle. And yes, numerous protists are also potentially dangeous biological pollutants.
64522
Why do you abuse this Answer system with your propoganda?  You didn't want an answer, you wanted to spew your pseudo-scientific garbage, and it looks like it failed.\n\nFluoridated water is safe and it's use is supported by REPUTABLE groups such as the ADA, AMA, WHO, CDC and hundreds of other scientifically SOUND organizations.  For a list of these please go to\n\nhttp://www.fluoridefacts.org/fluoride/flu_supp_org.asp\n\nMost groups that are against this tend to be fringe, self-serving groups who use scare tactics, innuendo, pseudo-science and other despicable techniques.  When faced with OVERWHELMING evidence from the scientific world I am sure you whip out the "conspiracy" BS too.\n\nThe vast majority of communities and people do not fall for this garbage and thus have a healthy fluoridated water system. \n\nYou should be ashamed of yourself for yourself for posted such poorly-documented pap.\n\nI am sure you are probably against the chlorination of water too.  Chlorine is poisonous too.....
453845
Because of osmotic pressure.\n\nThe water in the fish's body is full of impurities.  You know, fish parts.  Osmosis causes water to flow automatically to less "pure" concentrations.  So, a freshwater fish has no need to drink, the water is simply pumping into it's cells.  In fact, it has to work extra hard to get waste water out of it's system so it doesn't swell up and explode!\n\nSaltwater fish have the opposite problem.  The salt in the water turns the osmotic pressure around and the oceans are constantly pumping water out of saltwater fish.  They have to drink to make up for it.
1017938
It's NOT.  There's a lot of myth and folklore, but little (if any) scientific basis behind this.  \n\nJust drink when you're thirsty.  Period.
128534
I did use one once that stated that it was safe, but I'm not too sure.  If this is an aquarium you're talking about, why not get an algae-eater?  (Stay away from snails, otherwise that's all you'll have).
109305
Ther are millions of species of land animals that don't drink water. Snails, frogs, earthworms and so on. These animals all absorb water directly thorugh their skins and through their food and and never drink.\n\nThere area also numerous mammals species that don't NEED to drink water but regularly do. Everything from kangaroo rats to house mice to koalas.\n\n\nSorry, the question doesn't have an answer.
508819
I don't think there is an explanation currently.Despite other person's the answer below , you have to realise that , cerntainly in the UK , farmers use dowsers ( water diviners) to find wells.Farmers do not pay out good money if it doesnt work.\nThere is some movement towards an understanding at the web site below.If water has some sort of regular structure to it , then maybe there is a low frequency radiation that comes from it and , again , maybe , some people are sensitive to it.(Lots of maybes!)\nhttp://www.livescience.com/forcesofnature/041201_water_bonds.html
906188
Well, you're making a flawed assumption that something needs to be corrected. If the pH of the lake is 3 and there is life in the lake, don't you think it might affect the life if you neutralize it?\n\nIn response to the above answer, pee is an acid. If the lake has a pH of 3, it too is acidic. Peeing in it wouldn't do anything to neutralize it.
172448
Pure water is SO much better!!!  Doesn't it seem strange that humans are the only species that are not weaned by adulthood?  Doesn't it seem strange that humans drink the milk of another species?  Could you imagine monkeys breastfeeding on dogs?  Or hamsters breastfeeding on guinea pigs?  \n     Human breast milk is chemically different from cow's milk.  Cow's milk is designed especially for cows.  Cow's milk is designed to raise a newborn calf to a full-sized cow within 2 years.  How could such a thing be good for you?
440867
Many of the microorganisms in the pond water are actually plants.\n\nThe microscopic organisms living in the water column are usually refered to as plankton.  The phytoplankton are the microscopic plants, while the zooplankton are the microscopic animals.  The phytoplankton are the majority of the mass, mostly single celled algae and diatoms.
128882
I agree.  They pretty much all need water, but they can take up many different substances.  In some circles, it is believed that for every substance in the world, there is a microorganism that can break it down.  Things like nitrogen, different carbon sources and a polethora of other things are commonly taken up by bacteria.
272287
OK, what would you like to know, how to feed a paramecium or how it eats?\nIn any case, here is a great link that should help you find out EVERYTHING you did or did not want to know about them :-) They really are fascinating creatures!!\n\nhttp://www.101science.com/paramecium.htm
54784
Euglena is a photosynthetic organism. In able to photosynthezise it needs to be exposed to solar radiation, and, in a water environment, that implies living in the top layers of the water, and they use those vesicles as buoyancy.\nParamecium and amoebas are heterotrophic organisms, they do not need solar radiation to survive, so they can lack those vescicles to float on the water.
217101
Plankton are drifting organisms that inhabit the water column of oceans, seas, and bodies of fresh water.\n\nAmoeba itself is found in freshwater, typically on decaying vegetation from streams, but is not especially common in nature. However, because of the ease with which they may be obtained and kept in the lab, they are common objects of study, both as representative protozoa and to demonstrate cell structure and function. The cells have several lobose pseudopods, with one large tubular pseudopod at the anterior and several secondary ones branching to the sides. The most famous species, A. proteus, is 700-800 μm in length, but many others are much smaller. Each has a single nucleus, and a simple contractile vacuole which maintains its osmotic pressure, as its most recognizable features.
584296
because without it they wouldn't be alive. It is necessary for plants and animals to live. There wouldn't be rain, and oceans, and lakes without it. There are thousands of reasons for why people worship water, because it's WATER!
216940
Protoplasm can only be as high as the water meniscus pressure. I suppose it could be very large diameter, but not very thick. The cell is feed through osmosis from the arteries. I suppose with more capillaries feeding it there is no limit metabolically. If amoebas could not reproduce, fission, then would they get very big?
517414
There is a finite amount of energy in the ecosystem, regulated by the amount of sunlight plants can convert to usable forms of energy.  As you go up the food chain, a bit of this energy is lost at each level, meaning that at or above a certain trophic level, the energy input is insufficient to support an organism.  It's pouring water from bucket to bucket... You're going to spill some each time, and eventually, none will be left to pass on.