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  PROKARYOTIC CELL pexels-karolina-grabowska-8539723   Prokaryotes are one of the most ancient categories of living organisms on our blue planet Earth, with fossil records dating back to almost 3.5 billion years ago.                         The term “ prokaryote ” is obtained from the Greek word “ pro ”, (meaning: before) and “ karyon ” (meaning: kernel). It translates to “ before nuclei. ” These prokaryotes flourished in the earth’s very old environment, some using up chemical energy and others using the sun’s energy. These extremephiles flourished for millions of years, evolving and adapting. Scientists consider that these living beings gave rise to the eukaryotes. DEFINING CHARACTERISTIC OF PROKARYOTIC CELLS ·         Prokaryotic cells are comparatively tinier and much uncomplicated than eukaryotic cells. ...

  What is Diffusion ? Photo by  Jill Burrow  from  Pexels Diffusion is the process of movement of molecules under a concentration gradient or in trouble-free words the difference in the concentration of a substance between two spots is known as the concentration gradient . . It is an important process occurring in all living organisms. Diffusion provides movement of substances in and out of the cells. The molecules move from an  area of high concentration  to an  area of low concentration until the concentration turn out to be equal throughout.                    Diffusion happens in  liquids  and  gases  because their particles move randomly from place to place. Examples of Diffusion When we put a tea bag in a cup of hot water so that it is dipped completely, it diffuses into the water and the color of water changes....