Examlex
Which of the following is the most energy-dense source of calories in the human diet?
Species
The basic unit of biological classification, defined as a group of organisms capable of interbreeding and producing fertile offspring.
Extinction
The permanent loss of all members of a species from the earth, leading to a decrease in biodiversity.
Century
A period of one hundred years.
Estimated
An approximation or educated guess based on available information or data, often used when exact numbers are unavailable.
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