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Some beetles and flies have antler-like structures on their heads, much like male deer. The existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of which of the following?
Chronological Age
The actual age of a person measured in years from their date of birth.
Mental Age
A measure of an individual's cognitive ability expressed as the age at which an average individual reaches the same ability level.
Critical Age
A specific period in development during which an individual is particularly receptive to acquiring certain skills, such as language, often hypothesized to end at puberty.
Intellectual Age
A measure of a child's mental abilities expressed in terms of the average abilities of children at a certain chronological age.
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