The biological purpose of alcoholic fermentation is to provide anaerobic energy to unicellular microorganisms (yeasts) in the absence of oxygen from glucose. In the process, the yeasts obtain energy by dissociating glucose molecules and generate alcohol and co2 as wastes.
Human being, because a human being walks on all fours in early life, on two legs as an adult and with a walking stick in old age.
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B. When other people are in need, it is important to offer them help.
Answer: B
Explanation: Grandfather seems brave from what Mr. Carris says...