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How single-celled organisms navigate to oxygen
A team of researchers has discovered that tiny clusters of single-celled organisms that inhabit the world's oceans and lakes, are capable of navigating their way to oxygen. Certain choanoflagellate species form small swimming colonies and these colonies are thought to resemble the early multicellular organisms that later evolved into animals. The researchers observed choanoflagellate colonies swimming under controlled conditions and varied the oxygen concentration in the water over time.
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