The answer is caffeine. Caffeine
is used as a stimulant to maintain alertness and reduce drowsiness. Caffeine
is used to improve performance and most take it to allow them to continue
working when they naturally feel tired or
to stimulate the brain in the morning. It is consumed
in beverages such as tea, coffee, and soft drinks.
False teeth help the digestive system by chewing pieces of food into smaller pieces but it is not part of it.
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They are prokaryotic they have the shapes listed as cocci bacillus and spirilla can have chlorophyl but do not have chloroplasts..hope this helps
