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Caffeine
Nicotine
Aspirin
Chlorophyll
The main buffer system of the human blood is
The main constituent of haemoglobin is
The main difference between the living and nonliving is
The main function of hemoglobin is
The main function of insulin in the human body is
The main function of palisade parenchyma in leaf is
The main function of the kidneys is to
The main protein found in milk is _
The main use of salt in the diet is to
The major cell infected by the HIV is lymphocyte