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mass extinction event of 65 million years ago, in which about 85% of all species on Earth died out. This extinction marked the disappearance of the dinosaurs.
(also called polymers) large, more complex molecules formed when monomers join together.
(also called caustic soda) a white solid, available in pellets, flakes or granules, with the...
is a form of malnutrition where too many nutrients are taken in relative to the amounts required...
an infectious disease that can be spread or transmitted from one person to another.
process by which cells become specialised to perform a specific function.