Nutrients cross the membrane wall with the help of protein channels.
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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There are 3 Oxygen atoms bonded to 1 Nitrogen atom.
Hope this helps!
-Payshence
Is a proposition that has not been empirically proven yet, and that attempts to describe or justify a system or phenomenon.
I would say B is the answer because Athlete's Foot is an infection, African Sleeping Sickness is caused by a parasitic disease, and tuberculosis is a disease.
