The fermenter is sealed off from the air except for a long narrow vent pipe, which allows carbon dioxide to escape from the fermenter. Since there is a constant flow of CO2 through the pipe, outside air is prevented from entering the fermenter, which reduces the threat of contamination by stray yeasts.
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<em>I dont know what your asking but heres 2 good science fiction writiers! </em>
<em>-William Gibson</em>
<em>-Jules Verne </em>
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your answer is B and D
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I hope this helps
Have a GREAT day/night
mark brainliest, please :)
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2 or the second one.
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3 and 4 uses semicolons and 1 has no comma between black charcoal and pencils. :)