Who of the Following First Discovered That Some Blood Leukocytes

question 44

Multiple Choice

Who of the following first discovered that some blood leukocytes could engulf disease-causing bacteria?

• A)von Behring
• B)Meister
• C)Metchnikoff
• D)Ivanowski

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Definitions:

Blocking

A technique in experimental design used to reduce the effects of nuisance variables by grouping subjects into blocks based on these variables.

Experimental Unit

The smallest division of the experimental material such that any two units may receive different treatments during the experiment.

Psychology Class

An academic course focusing on the study of the mind and behavior, covering topics from mental functions to social interactions.

Observational Study

A study in which the investigator does not manipulate variables but rather observes and measures variables without intervention to find relationships.