Daphnia (IMAGE)
Caption
A new study shows that multicelled organisms like the metazoan daphnia (pictured) require a tenfold increase in energy compared with protists for their growth, maintenance and survival. The high cost of multicellular existence is offset by the many evolutionary advantages afforded to advanced organisms, from simpler forms like daphnia all the way up to vertebrate species, including humans.
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Photo courtesy of Marek Miś
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(CC BY 4.0) via Wikimedia Commons
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