lab report contaminents

Introduction The purpose for this audition is to try our biology testing ground course of instruction for contaminants. After choosing our 4 of course grime environments, (in grade of lab gateway hairgrip, calculator keyboard, classroom body of piddle system gush, and the tap ice chestful) my base assumes that; the angle army tank holds the more or little contaminants. The urine fountain is the twinkling well-nigh bemire. The keyboard is unused than the water fountain and the angle tank (being the tertiary greatest horde of contaminates), and the gateway handle is the cleanest (being floor to the to the lowest degree contaminants). Materials and Methods For this experiment, my congregation was instructed to test our biology lab for contaminates. We chose four-spot by nature contaminated environments to test (inside of lab door handle, computer keyboard, classroom water fountain, and the fish tank). We were given four sterile cotton plant woolen wool swabs and four nutrient nutrient agar familys. Each member of the group took whizz sterile cotton swabs and rigorously swabbed mavin of the naturally contaminated environments. Then separately of us slightly elevated the diadem of our respective agar plates and rubbed the gel of the agar plate from side to side, top to bottom of the agar plates while axial motion the cotton swab. Next we close the plate to ensure that it wouldnt interpose open (affecting the experiment results).

Results My group assumes the hypothesis that; the fish tank holds the well-nigh contaminants. ,the water fountain is the second most contaminated. The keyboard is cleaner than the water fountain and the fish tank, and the door handle is the cleanest .The results of my experiment rebutted my hypothesis. The results concluded that the water fountain held the most contaminants. It held one sign of bacteria which 85%of the tray (91% was covered). I also held a part of fungi, this fungi was in four colonies and covered 15% of the change area of the tray. The fish tank was the second most contaminated. It held four types of bacteria in fourteen colonies. (Five white, 2 brown, 1 languish connected yellow...If you compliments to get a skillful essay, parliamentary procedure it on our website: Ordercustompaper.com

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