how do animals obtain their nitrogen requirements?
407180
Only by eating protein rich food animals can obtain their nitrogen requirement.\n Herbivores obtain it by eating vegetable matter and carnivores get it by eating herbivores. We biologist call it a food chain.
192733
Cows have a two stage digestive system, like many animals that eat grasses. Because they consume so much grass and it is so hard to chew, they first swallow it to a pouch above their stomach.  Bacteria begins to breakdown the grass, much like fruit ferments, in that pouch.  Once it softens enough to chew, and the cow will regurgitate the cud (food) from the pouch to its mouth, chew it and swallow it to their stomach where it is digested much like ours.\n\nWe, birds and fish all have much more efficient digestive systems and so don't need to consume as much.  Also our diet has much more variety and food value.
706126
Yes, there are actually quite a few insects and animals that don't drink water.  They get the water they need from the food and plants that they consume.  Very handy for desert animals.
316479
Nitrogen gets into the soil from manure, fertilizer. Plants such as clover, alfalfa, and soybeans put nitrogen into the soil from the air.
891270
Ok, question for you...What planet do you live on, which country...and Why do you want it?\n\nUm, try a scientific supply catalog, or a vet supply store, or a feed store, they use it on animals alot.
339803
Sloth bears, like most wild creatures, seek foods which will return the highest nutritional value for the least expenditure of energy. Seasonal availability and geographic location are the biggest factors determining the primary food sources of sloth bears. \n\nWithin the tropics, termite and ant colonies are abundant and stable food sources. Sloth bears have adapted to become specialized termite hunters. The bears will dig into the hard tall pillars where the termites live. They then insert their muzzle to suck up the termites and their larvae. The noise made by this activity is very loud and can be heard up to 180 meters (200 yards) away. \n\nSloth bears will also climb and shake fruit trees to obtain food. Honey is also a source of nutrition for the bears, as are ants, berries, cultivated sugarcane, corn, cultivated yams and the fleshy flowers of the Mohwa tree. \n\nWhile not known to be very predatory in nature, sloth bears will eat virtually any carrion which they may discover. \n\nSloth bears prefer to feed during the night but will feed at any time of the day as necessary.
434377
Via the carbon cycle. Green plants take in carbon dioxide from air during photosynthesis to produce a 6C sugar. Herbivores eat these green plants and carnivores eat herbivores. All animals respire and give back carbon into the air via carbon dioxide. And when all animals die, putrefying agents aid in the decomposition of dead matter and carbon compounds are taken back into the soil or given out into the air as carbon dioxide.
571647
They do have taste buds and have a definite preference of one type of food over another.  Also, animals have an excellent sense of smell and that is an important component of how food tastes and determining if one thing is better to eat than another.
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.
331410
Animals take in Oxygen and give off Carbon Dioxide.\n\nPlants do the opposite.
562891
Members of the kingdom Animalia lack chlorophyll and hence, they cannot manufacture their food. They obtain energy by feeding heterotrophically. Their life is dependent on other forms of life and therefore, they obtain their food from other organisms...
58064
If you look at it from a aquarium, which is probably the simplist explanation.\n\nFish eat their food, whatever it may be, and produce waste. That waste decomposes into ammonia. Bacteria grow and consume the ammonia and produce Nitrites (NO2). This Nitrite is then consumed by a different bacteria which produces Nitrates (NO3). Nitrates are pretty much fertalizers for plants, and any plants you have in the aquarium will consume this for the purpose of photosynthesis. Then cycle then starts over with the fish or animals in the aquarium eating that. Other nutrients are involved of course, but that is the basis of the nitrogen cycle.
693671
No. Animals have muscles. Plants do not.
970586
To add to Diamond's explanation, remember the food chain that you learned about in lower school?  Small animals eat plants.  Larger animals eat smaller animals and so on and so forth until the top of the food chain dies and decays back into the soil to be used in the growth of new plants.  But the plants need sunlight to live by way of photosynthesis.  And that light comes from the sun of course.\nSo in addition to the heating of the earth and being the engine that powers our weather (which distributes liquid water--another thing plants need--all over the planet) the sun also sustains the cycle of life and the food chain.
651415
>Plant do not contain much organelles inside the cell\n so they posses large vacuoles in their cytoplasm.\n>Where as animals as more cell organelles in their cell\n They store some bio-molecules which is required for them during the necessary period like starvation.\nso animals do not have vacuole.\n\n>Plants are auto-tropic which can synthesis their own food.\nplant get their food by photosynthesis which is the       biochemical process. \nThe chloroplast plays the major role in photosynthesis.\n>Animal is an hetero-tropic depend on other for food.\nso they don't need chloroplast.\n\nchloroplast contains chlorophyll pigment which is green coloured pigment also make the plants to appear green.\nso animal do not require chloroplast anyway.
167900
Good question.  \n\nThe first thing you need to realise is that all living things contain some protein. Grass doesn’t contain much protein but it does contain a bit. To boost the amount of protein cattle get many places also sow their pasture with legumes like clover. Legumes contain  lot more protein than grass and that helps the cows a lot.\n\nBut the really clever part of the way that cows conserve protein. When most animals have proteins that are no longer needed, such as form worn out cells, the body strips the nitrogen off it and recycles the rest as food. The nitrogen then gets excreted in the urine as urea. Cattle don’t do that. If their diet becomes low in protein cattle will excrete the urea in their saliva instead of their urine. The urea goes straight into the stomach, and the bacteria their use it to make protein. So even though the grass a cow eats is often very low in protein the cow itself gets a lot of high protein food form the microbes. The cow is quite literally fertilising the microbes with nitrogen.\n\nFarmers have recently learned how to turn that to their advantage. If the pasture protein content drops farmers can feed their cattle urea fertiliser. Exactly the same urea fertiliser you buy for your garden. Although urea isn’t protein itself it allows the cattle to make protein. So even when eating low protein feed the cattle still put on weight so long as they are being fed fertiliser.\n\nAddenda\n\nGsshulkte said "ruminants have the ability to turn nitrogen\n>>>>>>>>> into protein. so when they eat legumes like \n>>>>>>>>>alfalfa and grains they can convert it into useable \n>>>>>>>>>protein. \n\nAny nitrogen in alfalfa or grains will already be in useable protein form.  That is why humans can and often do obtain all their protein requirements from a diet of alfaflfa and grains. There is no requirement to convert it and cattle have no advantage over any other animal using such foods as a protein source.\n\nSAMI said "Cows ...convert the carbohydrate in grass \n>>>>>(called CELLULOSE ) ...and use it for energy,fat and\n>>>>> protein the same way as humans.\n\nSami that is totally wrong. \n\nFirtsly humans cant use cellulose at all. It is totally indigestible to use. In human nutrition we refer to cellulose as dietary fibre becuse it is indigestible. It passes through as a fibrous mass with no benefit to us at all.\n\nSecondly it is simply  impossible to use a carbohydrate like cellulose for a protien. Carbohydrates lack nitrogen, which is a crucial component of proteins.
555114
Nitrogen is the key element which gives proteins their functionality. The body needs proteins to build and repair tissues. Animals get these proteins from plants who get it from the air. The nitrogen in the air also keeps us from bursting due to excessive respiration.