I believe it's the long arm of chromosome 17.
Worldwide circulation and reutilization of carbon atoms, chiefly due to metabolic processes of living organisms. Inorganic carbon, in the form of carbon dioxide, is incorporated into organic compounds by photosynthetic organisms; when the organic compounds are broken down in respiration, carbon dioxide is released. Large quantities of carbon are "stored" in the seas and the atmosphere, as well as in fossil fuel deposits.
Answer:
plant cells have a rigid cell wall that helps it keep shape and animal cells don't
"it reacts strongly when the drug is absent, a reaction known as withdrawal"