1. Samples of a microbial colony obtained from the natural environment are not pure culture. They are mixed cultures because the environment consists of an array of microorganisms and not one specific organism. A sample obtained from the natural environment such as water or soil may contain several species of microbes that need to be further isolated to obtain a pure culture.
2. Isolation streak plate technique involves the dilution of the sample several folds and then streaking a small amount using a sterile inoculation loop on an agar plate in a zig-zag manner. This is done to obtain a pure culture of bacteria from a mixed population by separating the microprocessor. When the sample is diluted into a small concentration and is streaked onto agar placed, widely spaced, discrete colonies of bacteria can be observed. These isolated colonies can be further cultured to obtain pure cultures by picking and re-streaking them on fresh agar plates.
3. A microbial colony is considered a pure culture because it consists of single species. A single species of bacteria cluster and form an isolated colony on an agar plate which can be further plated on fresh medium.
3-1 - If your agar plate shows discrete uncluttered colonies then you have obtained an isolated colony. The following picture might help you to understand.
3-2. If you subculture isolated microbes into a sterile nutrient broth without any contamination, it will still be considered pure culture because it is single isolated species in a sterile aseptic environment of the nutrient broth.
3.3. A pure culture can become a mixed culture due to contamination. This could be caused by airborne bacteria if your conditions are not aseptic. Contamination is possible if the work area is not clean and sterile or if the glassware is not sterile. The contamination can transform your pure culture into a mixed culture and is hence problematic. So, it is very important to maintain a sterile and aseptic environment, glassware, and instruments.
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Answer:
Based of off the Ten Commandments of Hinduism, some laws include:
Satya (Truth)
Ahimsa (Non-violence)
Brahmacharya (Celibacy, non-adultery)
Asteya (No desire to possess or steal)
Aparighara (Non-corrupt)
Shaucha (Cleanliness)
Santosh (Contentment)
Swadhyaya (Reading of scriptures)
Tapas (Austerity, perseverance, penance)
Ishwarpranidhan (Regular prayers)
Brainliest if i was helpful? uwu
Answer:
Half of
Explanation:
It has been established by a survey or research that about half of drivers who have given reports that while driving they fell asleep.
Sleeping while driving can be a major cause of accidents and a great risk to both the driver and other road users. It could be caused by lacking enough sleep, sleep disorders, medications.
Answer:
If the amount of cholesterol is increased in a region of the phospholipid bilayer and then a FRAP (Fluorescent Recovery After Photobleaching) experiment is conducted in the same region of the bilayer, the result of the FRAP experiment (which is a method for analyzing how diffusion occurs through a little portion of photobleached cells or tissues, and observing fluorescence recovery over time) would show that recovery from photobleaching does not occur in the region of the phospholipid bilayer because of the formation of lipid rafts which is caused by the increase in the amount of cholesterol in the region of the bilayer, and prevents diffusion of the lipid rafts to other parts of the bilayer.
Answer:
Racism is deeply rooted in the history of the US.
I believe it's this one because racismisn'ta new problem, it happens everywhere, and the one that says it can only be adressesed at an individual level is also false
