TOKYO -- The scientific taxonomy that classifies plants and animals has been shaken up over the past 20 years. Under new modes of classification, fish do not constitute a discrete category of animals apart from that of mammals.
Within the new system, monocotyledons, or flowering plants that have a seed with one embryonic leaf do not constitute a singular category and are now lumped together with dicotyledons, plants with seeds that have two embryonic leaves.
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