Question

The metabollic activities of organism cannot take place in the absence of........... .
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Answer 1

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Animal metabolism is the processing of material that individual animals take up from the environment. Some fraction of this material is unusable and leaves the body as feces. This fraction is sometimes called the non-metabolic waste and not considered as part of metabolism, because it does not pass the gut wall and therefore not really enters the animals body. The remaining usable fraction of the food uptake is converted into other chemical forms and subsequently used for various life processes such as body maintenance, somatic growth and reproduction. Part of the usable material is thus stored in the body, maybe only temporarily as reproductive output, but a substantial amount of material also leaves the body as metabolic waste, in the form of gas such as carbon dioxide, liquid such as water or urine, or even as solid waste in the form of hairs, feathers, scales and skin..

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