The Physics Of Advanced Microscopes Essay

1171 Words Dec 3rd, 2015 null Page
The development of advanced microscopes has enabled scientists to further their investigation on the criteria for life. As a result, biologists have been confronted with a baffling question: is there a size limit on life? If so, then just how small can something be before it can no longer be considered alive? Ever since the discovery of nano-sized particles called “nanobacteria” or “nanobes”, researchers have been scrambling to unravel and analyze the mysterious functions of these purported organisms. Their existence has raised many controversial questions, including whether or they are alive. Some experts claim nanobes are simply too small to be life forms, while others assert that nanobes are most certainly alive. Although the evidence from experiments by Kajander and Ciftcioglu can be used to support both sides of the argument, I believe that there is a more viable case for the theory that nanobacteria are indeed alive. Nanobes are the smallest cell-walled organisms on earth. When scientists viewed the nanoparticles under electron microscopy, the particles appeared to have an outer layer or membrane that may represent a cell wall. This outer layer surrounds an electron dense region interpreted to be the cytoplasm and a less electron dense central region that may represent a nuclear area. The presence of a cell wall typically indicates signs of life because cell walls are essential for the survival of the cell. Furthermore, the TEM (transmission electron microscopy) of…

Related Documents