The Evolution of Bacteria on a “Mega-Plate” Petri Dish (

The development of antibacterial resistance is a modern and terrifying example of evolution by natural selection. Antibacterial resistance essentially means that a microbe has developed resistance, or can now survive, when exposed to a substance that could originally kill the organism or prevent it from reproducing. As worldwide access to antibiotics has risen, so has the incidence and spread of resistant bacteria. This is a serious health threat because scientists and doctors cannot develop new drugs as quickly as the bacteria can evolve. (The average time for a new drug to be approved for use in the United States is 12 years!!) The World Health Organization estimated in 2014 that approximately 700,000 people worldwide die annually after being infected with drug-resistant microorganisms.

1. Watch the video below where researchers demonstrate the rapid evolution of antibacterial resistance in E. coli.

2. Using your knowledge of natural selection and evolution, explain what is happening here. Outline, from a biological perspective, exactly what is taking place! A thorough and carefully thought out response will touch on all of the elements and concepts that I have been emphasizing in class.

A thorough response will hit all of the following important points:

What is happening to the individual bacteria in this population over time? (all the way from the original bacteria that started the colony to the ones that are eventually able to survive when exposed to 1000x the level of antibiotic that would have killed their ancestors)
What is happening to the population of bacteria as a whole over time?
Why did the bacterial growth pause at the boundary of each section on the plate? What is happening during that time?
What created the selective pressure in this scenario?
What ultimately allowed this population to change over time?
Did the investigators include a control? If yes, what was it? If no, what would be an appropriate control for this experiment?
FOR FULL CREDIT: Student demonstrates a strong understanding and thought critically about the experiment. Post was free of syntax, spelling, and grammatical errors.



Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.

Money-back guarantee

At, You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

The Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.

Read more

Free-revision policy

The Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.

Read more

Privacy policy

The Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.

Read more

Fair-cooperation guarantee

By placing an order with at HomeworkCheg, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages