Biology Lab Report

Introduction: bacterium live in a contour of habitats such(prenominal) as soil, air, piddle system, on or in the bodies of animals and plants. The motive bacteria grass live in such a variety of habitats is primarily the size. Bacteria atomic event 18 microscopic, single- mobile phoneed, prokaryotic organisms. Bacteria play an important office staff in nitrogen reversion in plants and in dissolution of organic matter. There are varied faces of bacteria, some butt be pathogens and some can also be probiotics. Microbiologists look at bacteria by culturing them in sterile petri dishes containing a solid food medium made with agar. A population of a type of bacteria is referred to as a colony. Colonies can be different textures, colors, shapes, etc. depending on the bacteria species. In the experiment bacteria samples were collected from the surrounding environs and cultured. Experimental Procedure: As instructed by the lab book, 4 surfaces in the lab way or surroun ding areas were chosen to sample for bacteria. Door handles, cell phones, computer keyboards, shoes, soil and water were recommended for bacteria cultures to reach wide-cut potential. In this experiment, the bottom of a shoe, the screen of a cellphone, the electric discharge switch and the water spurt were the quaternion chosen surfaces.

in the beginning collecting samples, a petri dish was divided evenly into four quadrants and and so each quadrant was labeled and the petri dish was initialed. A sterile cotton pat was and so moistened with sterile deionized water and lightly stroked against the chosen surface. The eyelid to the petri dish was then lifted, the wipe up was lightl y streaked crossways the agar, the lid was ! placed keystone on and then it was enter which surface was placed in which quadrant. The previous steps were then repeated again apply a sterile swab each time for the neighboring three samples. The petri dishes were then incubated at 37 degrees Celsius for the next 24-48 hours and then stored at 4 degrees Celsius until the next lab period. Observations: SampleSource of Bacteria...If you want to stomach a full essay, order it on our website: OrderEssay.net

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