The Foramen (Meaning Opening) Magnum (Meaning Large) is a large opening at the base of the skull that the spinal cord passes through to connect the lower body to the brain. The Foramen Magnum is<span> one of the several foramina found in the base of the skull.</span>
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They are used as an indicator organism for pathogenic bacteria.
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Coliforms are bacteria found in digestive tract of animals and humans. They are non-pathogenic, easy to culture and are used as an alternative indirect testing for presence of other microorganisms. Coliforms thrive in exact environmental conditions like other pathogenic bacteria, thus often used to indicate whether they are bacteria found in drinking water and swimming pools that might end up causing infections.
Therefore the existence of coliforms in water easily indicates feacal contamination.
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Option 4
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There is only one ocean on planet Earth. Different names have been given to the 5 oceans based on geographical, navigational, scientific and historical reasons. ... This was used by the Greeks to describe the single mass of water that they believed surrounded the earth
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