Examlex
The developmental period of adolescence has only been identified in recent history.
Selective Advantage
A genetic or behavioral characteristic that improves an organism's ability to survive and reproduce in its environment.
Oxygen
A chemical element with symbol O and atomic number 8, essential for aerobic respiration in living organisms and a component of the Earth's atmosphere.
Multicellular Eukaryote
An organism made up of multiple cells that have a nucleus and organelles, including animals, plants, and fungi.
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