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a clear, colourless, odourless and tasteless liquid that can also occur as a gas (water vapour) and solid (ice). Water is known as the universal solvent and is essential to life on Earth.
an infectious disease that is widespread in tropical and subtropical parts of the world and is...
the dramatic increases in crop production around the world from the second half of the twentieth...
single-celled brown algae found in fresh water and seawater. They have hard, shell-like cell...
simple epithelium with elongated, cells that lines the stomach, small intestine, urethra, vas...
primitive type of fish that lives very deep underwater and has four leg-like fins. It is thought...