Petri dish

when, former bacteriologist Alexander Fleming went on vacation, his laboratory was not very clean or orderly. While away a stray mold spore flew through the open window, and landed on one of Fleming's petri dishes. All the other dishes that were left in the open were all covered in mold. The one dish that quickly stood out to Fleming was the one that was full of bacteria.…

cells can be manipulated to become any cell but it has some restrictions. 3 Embryonic stem cells are from embryos that developed in eggs, which have been fertilized through virto fertilization (fertilizing the egg in a Petri dish). These…

Alexander Fleming saw something peculiar in one of his petri dishes. There was a ring that didn’t have any bacteria in it. This bacteria killer was called penicillium notatum, or Penicillin. While Alexander Fleming was away on his vacation, a rare mold spore landed in one of the petri dishes that Alexander left out. When Alexander came back, he didn’t notice anything right away. When a former lab assistant came by, he happened to grab the dish that had the mold spore. As “The Discovery of…

the name of Alexander Fleming went to go on vacation but left his laboratory into a complete disaster. Once he returned to his laboratory, he discovered that every dish he left out had been covered in a hideous mold. Fleming investigated the mold very cautiously to find out if the mold had been contaminated. But a certain dish of petri fish caught most of his attention.…

Independent Variable(s): Vinegar (200 mL), distilled water (200 mL), maple syrup (150 mL) Dependent Variable(s): Egg Problem: After twenty-four hours in each solution, what will happen to the egg and its mass? The solutions will make the mass of the egg increase and decrease depending on what the density of the liquid is. Hypothesis: If we put the egg in different solutions for twenty-four hours each then it will increase in volume when it's in the vinegar and distilled water but it will…

by the name of Alexander Fleming left his laboratory a mess and left to embark on a one month vacation. As stated in an article by Jesse Lane “Not-So-Dumb-Luck” (P6,S2,S3,S4) “ When he came back, he noticed that every dish left out in the open was covered in mold. He examined each dish closely to see if any hadn’t been contaminated. Suddenly, Fleming’s…

flies of either sex were placed in each of three 1.125 L cages having a mesh-covered window (ca. 28cm2) for ventilation (i.e., 15 male and 15 female flies for each treatment). All cages were provided with water-soaked cotton and sugar in a 35 mm Petri dish. In individual cages, for each of treatments 10 male and 10 female flies were placed singly in 70ml containers having 8-10 2-mm holes for ventilation. Flies were provided with water-soaked cotton and sugar (as a solution dried onto 1-cm…

Question: How much bacteria will be found in each pedicure spa? Hypothesis: If I swab multiple pedicure spas using a test kit, streak plating, and colony morphology, then I will find the presence of bacteria is unsafe because cleaning practices are not followed properly. Procedures Determine the five pedicure spas in which you will obtain samples from Give each pedicure spa an anonymous name (Ex: Spa A, Spa B, Spa C) Type up an approval letter stating what you will be doing and what it is for…

Humans and animal have complex systems that are very similar in the way they function, such as the respiratory and circulatory tract. Thus, other alternative methods are sometimes useful, such as using cells in a Petri dish, it does not provide the detailed information given by testing and researching the effects on living animals. Identifying the drug side effects require the circulatory system, because it can deliver the drug to all parts of the body. 4. Animals…

Germs are everywhere. Fortunately, most pose no risks to people. And those that do cause disease usually can be killed with antibiotic drugs. Sometimes, however, harmful bacteria evolve ways to “laugh at” antibiotics — survive as if the poisons were not even there. This so-called drug resistance make infections hard, if not impossible, to treat. How bacteria learn to resist killer drugs normally is invisible. But scientists have just unveiled a new tool that lets them watch it happen, right…