The process of occurring or happening in turns; a pattern where things switch back and forth between two or more states or positions.
From Latin 'alternatio,' derived from 'alternare' (to alternate), with the suffix '-tion' indicating the action or process.
The alternation of generations in plants—where a multicellular spore-producing form alternates with a multicellular sperm-and-egg-producing form—is absolutely unique in the plant world and was revolutionary in evolutionary history!
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