Which of these are characteristics of microorganisms?

An axenic environment is one that __________ .

a. exists in the human mouth

b. contains only one species

c. exists in the human colon

d. both a and c

The study of the cause of a disease is __________ .

The study of where and when diseases occur and how they are transmitted within populations is ___________ .

Which of these is considered a microbe but NOT a microorganism?

Antonie van Leeuwenhoek observed microorganisms under his microscope and called them 'animalicules' (little animals). Which microorganisms did he observe?

Robert Hook's and Antonie van Leeuwenhoek's microscopes were not powerful enough to observe:

Which of the following is the most important element of Koch’s germ theory of disease? The animal shows disease symptoms when

a. the animal has been in contact with a sick animal.

b. the animal has a lowered resistance.

c. a microorganism is observed in the animal.

d. a microorganism is inoculated into the animal.

e. microorganisms can be cultured from the animal.

Match the people in column A to their contribution toward the advancement of microbiology, in column B.

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