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Microbiology

Short Answer

MicrobiologyShort Answer

Short Answer

29.

Explain in your own words Pasteur’s swan-neck flask experiment.

30.

Explain why the experiments of Needham and Spallanzani yielded in different results even though they used similar methodologies.

31.

How did the explanation of Virchow and Remak for the origin of cells differ from that of Schleiden and Schwann?

32.

What evidence exists that supports the endosymbiotic theory?

33.

What were the differences in mortality rates due to puerperal fever that Ignaz Semmelweis observed? How did he propose to reduce the occurrence of puerperal fever? Did it work?

34.

What is the direction of water flow for a bacterial cell living in a hypotonic environment? How do cell walls help bacteria living in such environments?

35.

How do bacterial flagella respond to a chemical gradient of an attractant to move toward a higher concentration of the chemical?

36.

Label the parts of the prokaryotic cell.

A diagram of a bacterial cell. The thick outer structure of the cell is not lableled. The next layer in (a thinner structure) is labeled E. A much thinner structure inside of that is labeled F. Inside of F is the main body of the cell. Small dots are labeled B. A long line forming a loop is labeled C. On the outside of the cell, short projectsions are labeled A and a long projection is labeled D.
37.

What existing evidence supports the theory that mitochondria are of prokaryotic origin?

38.

Why do eukaryotic cells require an endomembrane system?

39.

Name at least two ways that prokaryotic flagella are different from eukaryotic flagella.

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