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Explain how natural selection can give rive to a population of antibiotic resistant bacteria?
Consider the following scenario: An antibiotic is applied to a petri dish of bacteria. The antibiotic will kill of most of the bacteria, but some will remain that are immune to the antibiotic. Therefore, only the immune bacteria will reproduce. Soon, the whole petri dish will be full of bacteria that is immune to the antibiotic. Nature "selects" the immune bacteria for survival.
What equipment can be used to grow bacteria?
Agar and petri dishes.
Why should you label the petri dishes correctly?
The importance of labeling petri dishes is important. When looking at reaction on specimens or the growth of bacteria of items in a petri dish, if it is labeled incorrectly the data will be wrong and projects could be jeopardized.
How do you determine if an antibiotic is effective at stopping the growth of bacteria?
First, the lab tech needs to grow a culture of the bacteria on a medium (bacteria food) in a bunch of petri dishes. Each petri dish will contain millions of bacteria.Then, the tech puts a little of each antibiotic being tested on one of the bacteria samples. A different antibiotic is tested in each petri dish.She checks back later to see which antibiotic killed the most bacteria. She is looking for a bacteria-free area around where she put the drop of antibiotic.The technician writes a report for the doctor, to tell him which antibiotics worked the best.The doctor will check to see if you are allergic to an antibiotic before writing you a prescription. (You may want to remind him if you have any such allergies.)This is called a sensitivity test. If you take one kind of antibiotic and it doesn't work, be sure to ask your doctor to do a sensitivity test before you try any more types of antibiotic. If you just keep taking different antibiotics, your bacteria may become resistant to antibiotics. You could spread the resistant bacteria to other people. So insist on getting the test.
Can you use blood to grow bacteria on petridishes?
Bacteria will grow in blood but no the growing medium in petri dishes should be clear agar.
Who is the father of Antibiotics?
Alexander Fleming discovered penicillin, the first antibiotic. He discovered it by accident when he noticed that some petri dishes (medium to grow bacteria) had been contaminated -- some mold was growing in them, and around the area of the mold the bacteria wouldn't grow.
A shallow glass container used to prepare cultures in science lab?
beakercould be a petri dish
Why would you grow bacteria in petri dishes?
put agar in a Petri dish, then use a Q-tip to wipe a dirty surface, then spread it on the Petri dish in a zigzag motion, then it will grow over time.
How do antibiotic resistant bacteria come about?
This term is misleading. The antibiotic "selects" bacteria that are not affected by it. If a person will grow bacteria on a petri dish and add an antibiotic to it, some bacteria may live and grow. This is actually a form of natural selection. The ones that will grow are resistance to the antibiotic. They have some way of not being affected. If a person takes a colony from the plate that has this resistance and grows it on another plate and add the antibiotic, all on the plate will be resistant.
What is Julius Richard Petri known for?
Julius Richard Petri is known for being the inventor of the petri dish. In early bacteria studies, cultures were kept in lidless dishes and as a result they often became contaminated. Julius Richard Petri invented a dish with a lid that reduced the risk of contamination and this has become known as the petri dish.
Where can you buy petri dishes?
safeway
What are the uses of petri dishes?
is a shallow cylindrical glass or plastic lidded dish that biologists use to culture cells - such as bacteria - or small mosses.
