Wrap your specimen in the original wrapping and give it your instruct to dispose of
Salmonella can spread to people in foods that have come into contact with infected animal feces. these exposures happen when food such as poultry, eggs, and beef are not cooked enough. Fruit and vegetables can also become contaminated from feces in the soil or water where they are grown.
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A heterogeneous mixture composes of non- uniform components, so the concrete would be the answer, because you can tell the components from one another.
Buffer?
<span>A buffer is the substance that prevents rapid or large swings in pH
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