Question

population size and structure
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typhoid fever is caused by bacteria in contaminated food or drink. in 1903, an outbreak of typhoid fever in ithaca, new
york, killed almost 80 people. in addition, more than 1,000 ithaca residents became sick with the disease. the
population shares the public water source. which type of limiting factor was involved in the typhoid outbreak that
occured in ithaca?
o density - independent factor
density - dependent factor
o population - dependent factor
o population - independent factor
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Explanation:

Density - dependent factors are influenced by population size. In this case, the typhoid outbreak affected a large number of people (a population - related impact) through a shared resource (public water source). Density - independent factors are not related to population size (e.g., natural disasters like earthquakes). Population - dependent and population - independent are not standard ecological limiting factor terms.

Answer:

B. density - dependent factor