Intro to micro Flashcards
what are microbes
minute living things too small to be seen with the naked eye
what percentage of microbes are beneficial
> 87%
what percentage of microbes are opportunists
10%
what percentage of microbes are pathogenic
<3%
how many lbs of organisms are on our body
5 lbs
what is microbial ecology
recycling elements between soil and atmosphere
what is bioremediation
living organisms and waste cleanup
what is an example of recombinant DNA technology
insulin production
what is CRISPR
ability to delete and possibly replace genes
what is the resolution of transmission electron microscope
0.2 nanometers
what is the resolution of a scanning electron microscope
20 nanometers
what is darkfield microscopy
light is reflected by the condenser so that the light waves enter the slide at an oblique angle
only light reflected off the specimen and into objective lens is seen
what is phase contrast microscopy
utilizes light’s properties in contrast to light passing through nothing and light passing through an object
live specimens can be easily pbserved
what is fluorescent microscopy
illuminator=uv light
some cells naturally fluoresce
what are electron microscopes
transmission magnification=1 mil X
scanning magnification=10,000 X
utilizes wavelength of electrons for resolution
can only see specimens dead
