What scientific criteria were developed by Jacob Henle to link an organism to its specific disease?
a. Give samples of the organism to three different researchers and see whether all three researchers can grow it successfully.
b. Grow the organism on the diseased tissue and then see whether, when spread on normal tissue, the organism continues to grow.
c. Identify microorganisms under a microscope and grow them on the tissue that the disease usually infects.
d. Identify the organism, isolate the organism, and see if the organism produces disease.
Question 2
In what way are antibiotics important in reducing the spread of communicable diseases?
a. They help keep the environment free of the infectious agent.
b. They help the host resist the infection.
c. The kill the entire infectious agent upon contact with it.
d. They reduce the time during which the disease is contagious in the infected person.
The threespine stickleback (Gasterosteus aculeatus) has been used as a model organism for the study
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