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(also called the pith) the central part of the stem that consists of large, thin-walled parenchyma cells with intercellular airspaces
cellular respiration that takes place in the presence of free oxygen.
process whereby excess amino acids are broken down in the liver to form urea.
variation due to the small differences in the genes that control each feature and characteristic...
the fluid that circulates through the lymphatic system. It is similar to blood plasma in...