Examlex
Differentiate between a person who has an asymptomatic allergy and one with a symptomatic allergy.
Sneer
A facial expression that can signify disdain or contempt, often characterized by the corner of the lips being turned up or down.
Baring One's Teeth
A physical expression, often indicating aggression or preparation for attack, by showing one's teeth.
Paul Ekman
A renowned psychologist known for his research in the field of emotions and their expression through facial expressions.
Charles Darwin
A British naturalist and biologist known for his contributions to the science of evolution and for his proposal that natural selection is the mechanism by which evolution occurs.
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