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the number of people per unit area.
substance used to test for the presence of starch. It is a mixture of elemental iodine,...
membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the...
(also called lithospheric plates) massive, irregularly shaped slabs of solid rock.
structure surrounding plan tcells i tgives cells rigidity and strength.
regions in particular geographical locations with similar climates and vegetation types.