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one of the building blocks of lipids (fats).
organic compound that always contains the elements carbon, oxygen and hydrogen. The building...
a sac-like structure in plant cells that contains the cell sap. It supports the cell and helps...
(also called the pith) the central part of the stem that consists of large, thin-walled...
the loss of water from the land to the atmosphere by evaporation from land and water surfaces,...