Answer:
Explanation:
As a microbiologist there are different methods are devised for characterization of microbes.such as Macroscopic analysis and microscopy method.
With the help of microscope the needed information about the individual cell such as individual cellular characteristics can be obtained, the magnification help to provide the features such as size, shape and motility of the microbes which helps to know the specific microbes characters.
When handling an unknown environmental microbe, with help of the cell characteristics of the microbes obtained using the microscope, the identity as well as metabolic characterization can be known such as the type of environment the microbes can survive in(aerobic or anaerobic), the source of food.
No growth was observed on the control plate.
The growth on the control plate indicates that the aseptic technique devised in the model was an adequate method for the prevention of the control plate from been contaminated.
Answer:
Mutations are essential for evolution to occur because they increase genetic variation and the potential for individuals to differ. The majority of mutations are neutral in their effects on the organisms in which they occur. Beneficial mutations may become more common through natural selection.
In cell division, the S-phase is characterized by the duplication of chromosomes. The correct option is B.
<h3>What is S-phase?</h3>
Cell division is the division of parent cells into two daughter cells under favorable conditions.
S-phase is the synthetic phase that is responsible for the duplication of the genome along with the accumulation of essential nutrients required by cells for division.
In cell division, the S-phase is characterized by the duplication of chromosomes.
Thus, the correct option is B.
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