<span>Enzymes act the same way as catalysts; they speed up the reaction. An enzyme which typically digests starch will not act upon the sugar sucrose. This fact indicates that enzymes are specific. This means that enzymes will only act on particular reactions that match their purpose. </span>
Satellites in space observe the Earth from a distance and help scientists study large tracts of land and how that land changes over time. Optical remote sensing satellites use reflected light to detect electromagnetic energy on the Earth's surface.
