A placebo experiment is one that does no harm or good. A lot of the time researchers will have a. placebo group and a another control group with the actual treatment. The key in placebo is that no one knows if they have it or not. C
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The maxillary first molar normally has three roots. The mesiobuccal root is broad distobuccal and has prominent depressions or flutings on its mesial and distal surfaces. The internal canal morphology is highly variable, but the majority of the mesiobuccal roots contain two canals.
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haha you're so funny but free points I guess
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Color – pure water is colorless; colored water can indicate pollution.
Turbidity – pure water is clear and does not absorb light.
Taste and odor – pure water is always tasteless and odorless.
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