Useful: Bacillus thuringeinsis
This bacterium, known as Bacillus thuringeinsis, is well known to be an important component of many insect-eliminating products. The content of the cell includes a few number of shaped particles, each have their part on acting as a whole. Several round structures in the bacteria are spores that are covered by the cell wall, with darker, angled shapes that look like crystals called B.t. toxin. This toxin is poisonous towards many types of insects that consume it, which includes mosquitos, different types of beetles and worms, ideal to keep pests away from crucial areas around the house. Around 400 types of this bacteria-based products are registered to be buyable in the U.S.
Harmful: The Cold Virus
The common cold is caused by a virus that is transferred usually by small droplets of a cough or sneeze of a person that already has the virus. This virus particle attaches itself onto a cell, gets in, multiplies and kills the cell, making it rupture and spew out freshly-made virus cells onto the other cells. Though it might not be the worst virus in the world, it is one of the easier ones to obtain, giving ones who are sick stuffy nasals, sore throats, sneezing and coughing with hoarseness of the voice, and probably fevers and headaches.
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