In the viable plate count method, a measured volume of a culture is evenly spread across an agar surface and incubated. Each <u>colony </u>represents one <u>cell </u>from the original sample.
Explanation:
A viable count is the number of colony forming units (cfu) of microbes per gram or per milliliter of the sample, or cfu/gm or cfu/ml.
In order to find whether the cells counted is viable or not, methods like plate-count method, membrane-filter methods are used. These tests allow the visible cells to grow and multiply to check the viability.
The plate count method is done by growing the microorganisms like bacteria on a plate in a nutrient medium or substrate like the agar surface. The bacteria will grow into colonies and will be visible to the naked eye.
Each colony unit is counted and each unit in a colony represents a single cell of the bacteria or any microorganism cultured and counted.
The counting is done by various methods like hemocytometers, streak plate etc.
Punctuated equilibrium, it is rapid evolution with little change in between
Answer:
B)they make proteins from amino acids
Explanation:
D. an inherited variation
By convention, it has been determined that alpha or significant levels should be set no larger than 0.05. This is considered as the standard value set and agreed by convention for the probability of making a Type I error. Sometimes, 0.01 is used especially for medical related researches.