The Amoeba moves by extending part of its cell. Changes include any change to the procedure written in the lab manual, this includes glassware and concentrations, as well as chemicals. This was isolated and a Gram stain was performed. Any laboratory procedure you follow without a hypothesis is really not an experiment. There was only one colony that was apparent. We fill another beaker with water.
The second unknown bacteria was identified as a gram positive bacteria with a coccus shape. The next test performed was a Nitrate Test which gave a positive result. The controlled variables are the ones that don't change throughout the experiment. At this point everything that had been learned in microbiology lab and that had been explained in our lab manual 1 was put into action. Your grade greatly depends on this. Conclusion In this lab I learned about the structure and function of the smallest eukaryotic organisms, the unicellular protists.
Both plates were studied, noting their characteristics, which were recorded in a journal. The objective cannot be a verbatim, unreferenced restatement of the objective or purpose that appears in the lab manual. They all have varying shapes, sizes, and survival strategies. Relative tooth width displays the tooth width relative to the length of the jaw. Often, the abstract is the last piece of the report written. A Gram stain discovered that the bacteria were rod shaped. Finally, Amoeba moved with a pseudopod, and so is a sarcodine see Fig.
The purpose of this study was to identify a Gram positive and a Gram-negative bacterium from a mixed culture. It was determined that it was a Gram negative rod. If you have any questions about what appears in this example, talk with your teaching assistant or contact the course supervisor. When the Paramecia feed, it does so by drawing its food into a funnel-shaped opening called the oral groove that is lined with cilia see Fig. The coyote and human molar cusps were very similar in molars one and two. This extruding part is the pseudopod, and allows the Amoeba to drag itself from one place to another see Fig.
Amoebas do not seem to have a particular shape, with the exception of the pseudopodia that consistently protrude from the cell. This was the correct identification because all of the other Gram negative were eliminated. Both of the plates were labeled and stored in the refrigerator. The streak method was used to spread the bacteria across the nutrient agar in hopes of isolating a pure culture of one of the bacteria. It can be called a practical write-up, which is the part of laboratory studies in disciplines like chemistry, biology, etc. For example, it is 2. Formalized Hypotheses example: If the incidence of skin cancer is related to exposure levels of ultraviolet light , then people with a high exposure to uv light will have a higher frequency of skin cancer.
Report: A sample lab report for this activity is provided as an example for you to follow when writing future lab reports. A positive catalase test verified that the bacteria in the unknown would have to be S. Example of a Microbiology Unknown Lab Report by Taylor Autry Introduction In this paper I will discuss the processes of how I came to find my two unknown bacteria. Through careful observation, we analyzed various protozoan cultures in order to identify characteristics associated with cell structure and movement of these one-celled organisms. Note: Most 100-level chemistry labs require only worksheets to be filled out at the completion of each lab.
However, be careful not to over explain or add in irrelevant information. The diameter of each of the 5 objects was measured with either the ruler or caliper. Bess Ruff is a PhD student of Geography in Florida. They thrive on moisture and can be found on moist soil and in fresh and marine bodies of water. One of the most successful collaborations of two different fields is technology and human. A sample was taken from this colony and transferred to a nutrient broth agar to further isolate it.
Despite differences in locomotion and the varying plant-like and animal-like organelles, all protists share key characteristics and functions that allow them to feed, grow, and reproduce--processes essential for survival and common to complex organisms. The lab manual may dictate where it should appear. The identity of any unknowns or the final desired results are to be stated in this section. For example, often in basic physics a surface is assumed to be friction-less to make equations easier, but that creates error, but that wouldn't appear in a more advanced level of physics or in other scientific fields. If I were you, I would obviously … Read more » Thanks for this, it proved to be helpful. The second test performed was a Urea Test which also gave a clear positive result confirming that unknown gram positive bacteria as Staphylococcus epidermidis because Staphylococcus aureus gives a negative result.