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a) The E. coli population has genetic variation. b) The selective agent is streptomycin. c) The mutation resulting in streptomycin resistance is random. d) E. coli changes its gene structure to become antibiotic resistant in the presence of streptomycin. a) The E. coli population has genetic variation.
3 days ago · Note: In prokaryotes such as E.coli, they do have a defined nucleus. Hence the DNA is not scattered throughout the cell. The region called a nucleoid, the negatively charged DNA is held by some positively charged protein. The DNA in the nucleoid is arranged in a large loop held by protein.
3 days ago · Examine the preparation under microscope first under 4 x followed by 40 x and 100x magnification; Identify the motile organisms; Clean up the slide with alcohol first (because it had live bacteria on it), followed by soap and water. Discard the cover slip. How to Focus: First focus with the 4x objective on the edge of the coverslip.
4 days ago · March 25, 2024. Endolimax nana is a type of single-celled parasite. It is an organism that is not commonly known, but can be found in the human intestinal tract and is interesting to know about. Most of the time, Endolimax nana lives in the gut without causing any issues; however, in some cases it can lead to uncomfortable digestive symptoms.
4 days ago · Under the microscope in spring practice. premium-icon 21m ago football Edit As spring practice begins, some players could not only benefit their own niche as starters or high up in the rotation ladder but also have a considerable impact on their respective positions.We ide... premium-icon PREMIUM CONTENT You must be a member to read the full ...
6 days ago · 1 / 4. Find step-by-step Biology solutions and your answer to the following textbook question: You are viewing an organism under a low-power microscope. Even though you are viewing just one cell you notice organization, distinct supportive structures, and locomotor devices. Which creature are you likely viewing?
6 days ago · A _____ electron microscope produces a three dimensional view of a specimen by measuring electrons knocked out of the surface of the specimen. True The lamp of a fluorescence microscope emits light that is not visible to the eye. A. True B. False