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deep, narrow holes drilled into the earth to reach the ground water in aquifers.
outgrowths of neurons (nerve cells) that transmit nerve impulses towards the cell body.
membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the...
the part of the cell that controls all the activities of the cell and plays an important role in...
a biological classification group (taxon) that is divided into families.