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rain that contains high levels of sulfuric acid, hydrochloric acid and nitric acid.
a person who does not eat animal flesh, but does usually include milk and eggs in their diet....
the most common and most movable type of joint in the body of a mammal e.g. the elbow.
found in the cell wall of xylem cells where the secondary cell wall is absent but the primary...
biological classification group (taxon) for plants that are divided into classes.