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a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy, without being changed by the reaction.
barrier made of coral (a living organism consisting of animal and algal tissues) that lies in...
tough cartilage that acts as a shock absorber between vertebrae and at the ends of bones in ball...
the protection of species, habitats and ecosystems and the management of natural resources.
single-celled brown algae found in fresh water and seawater. They have hard, shell-like cell...