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graphical representation of various aspects of food chains.
the nerve cells that transmit nerve impulses towards the central nervous system from the...
specialised proteins which catalyse chemical reactions and thereby speed up chemical reactions...
the osmotic pressure that develops within the cells of a root system that causes the sap to rise...
structure surrounding plan tcells i tgives cells rigidity and strength.
processes used to create copies of DNA fragments (usually genes), cells or organisms to create...