Bacterial Colonies in Your Environment

Biology research laboratory Report
Bacterial Colonies in Your Environment

Purpose
The purpose of this testing ground is to culture, examine and describe microorganisms (bacterial colonies) from sources in daily surroundings that we be exposed to.

Variables and Controls
The in underage variable was the places we decided to swab for bacteria.
The dependent variable was the types of bacteria that grew within the agar plate
The controlled variables were the temperature in the sir, how skintight the agar plate was sealed and how much food was in the agar plate.


Materials
-a sterilized agar plate (with lid)
-markers
-soap and water
-clear tape
-sterile cotton swabs

Lab Safety
In this lab we deprivationed to wash our manpower constantly before and after the lab. We were dealing with bacteria that has the tycoon to be harmful and to avoid illness/sickness we need to thoroughly wash our hands and be careful close to the bacteria. Another precaution to take was to not cough into or put whatever bacteria from our bodies into the agar plate. Those bacteria could be extremely dangerous and shouldnt be cultivated.

Observations
Located on final page(s)

Application Questions
1.



The purpose of heating the agar plates in the autoclave prior to inoculating them with microorganisms was to make sure that the lab results were exact. The plates might fetch not been properly cleaned beforehand or the bacteria in the air/where they were stored might still nonplus on the plate. Due to those bacteria the lab results might have turned out differently because we cultured different bacteria from places we did NOT swab. To prevent this we must sterile the plates. Bacteria dies at high temperatures so the plates were heated to kill off any lingering bacteria that may have been present on the agar plate.
2.A sterile cotton swab was use as opposed to a unshakable one because befoulment might have occurred and twisted the lab results. If a regular cotton swab was used from a large box, or a previously...If you want to get a full essay, separate it on our website: Orderessay



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