Which of the following individuals is most fit in evolutionary terms?
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A child who does not become infected with any of the usual childhood diseases, such as measles or chicken pox
A woman of 40 with seven adult offspring
A woman of 80 who has one adult offspring
A 100-year-old man with no offspring
A childless man who can run a mile in less than five minutes
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In evolutionary terms, fitness refers to an organism’s ability to leave offspring in the next generation that survive to pass on genetic traits. The woman of 40 with 7 adult offspring has left the most surviving offspring and is the most fit evolutionarily.