(function(i,m,p,a,c,t){c.ire_o=p;c[p]=c[p]||function(){(c[p].a=c[p].a||[]).push(arguments)};t=a.createElement(m);var z=a.getElementsByTagName(m)[0];t.async=1;t.data-privacy-src=i;z.parentNode.insertBefore(t,z)})('https://utt.impactcdn.com/P-A2895791-37fd-407b-ad4a-b25098d4359e1.js','script','impactStat',document,window);impactStat('transformLinks');impactStat('trackImpression');

Bacteria are single-celled microorganisms which can exist either as independent (free-living) organisms or as parasites (dependent upon another organism for life). They are about 0.5 to 2 micrometres in size. A grain of sand is 2 millimetres in size. This means you could fit 1000 bacterial cells into a single grain of sand. This means we can only see bacterial cells through the microscope.

Go to Top