Which Type of Study Observes Specific Human Populations for Unusually

question 36

Multiple Choice

Which type of study observes specific human populations for unusually high levels of a disease?

• A) a case-control study
• B) a cross-sectional survey
• C) an ecological study
• D) a correlational experiment

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Definitions:

Electrode

A conductor through which electricity enters or leaves an object, substance, or region, used especially in energy storage and transfer.

Endosymbiotic Relationship

A symbiosis in which one organism lives inside the other, a relationship thought to have led to the evolution of eukaryotic cells.

Aerobic Bacterium

An aerobic bacterium is a type of bacteria that requires oxygen for its energy production and survival.

Circular Chromosome

A chromosome which forms a closed loop, found predominantly in bacteria and archaea.