Arrange the following from smallest to largest. (Hint: convert all sizes to the

Question

Arrange the following from smallest to largest. (Hint: convert all sizes to the same unit first) Rhinovirus (common cold virus) Human red blood cell Amoeba Yeast cell Coccus bacterium 30 nanometers 10 micrometers 100 micrometers 15 micrometers 1000 nanometers Place the following important events in the history of microbiology on the timeline of US history Koch introduces his postulates Construction of microscope by Antony van Leeuwenhoek Hooke described microscopical mushroom Francesco Redi refutes spontaneous generation Pasteur introduces pasteurization; shows that fermentation is due to microbes

Explanation / Answer

As we know that 1 nanometer = 0.001micrometre

So, the size of the Rhinovirus (common cold virus) =30x0.001=0.03 micrometers

The size of the Human red blood cell = 10 micrometers

The size of the amoeba cell = 100 micrometers

The size of the yeast cell = 15 micrometers

The size of the coccus bacterium = 1000 x 0.001 = 1 micrometers

Hence, in ascending order or smallest to largest

Rhinovirus (common cold virus) =30x0.001=0.03 micrometers

Coccus bacterium = 1000 x 0.001 = 1 micrometers

Human red blood cell = 10 micrometers

Yeast cell = 15 micrometers

Amoeba cell = 100 micrometers                        

2. place the following events in the history of microbiology on the timeline of us history

The history of microbiology on the timeline is as follows-

-In 1660 Francesco Redi refutes spontaneous generation.In this spontaneous generation demonstrated that the eggs of flies give the maggots and proofs that maggots are not coming from the spontaneous generation.

-In the year 1665 Robert Hooke described about ‘Microscopical Mushrooms’. With use of microscope he discovered the ‘Microscopical Mushrooms.’

-In the year 1674, Antonie van Leeuwenhoek constructs a microscope for the discovery of microorganisms. In this microscope he used lenses which have 270 times magnifying capacity.

-In the year 1866, Louis Pasteur introduces the process which shows fermentation is due to microbes and today that process is called as pasteurization. In the process of Pasteurization moderate heat is used to destroy the harmful microorganisms which does not affects the chemical composition of the substances which are being pasteurized.

- In the year 1882 Koch introduce his postulates in which he designed four criteria which establish the causative affiliation between a microbe and a disease.

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