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Showing 1 to 1 of 1 for “"Water and ion absorption"”.
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Osmoregulatory role of the intestine in fish physiology. Evolutionary, environmental, and toxicant implications
The earliest fishes arose circa 500 million years ago (mya) during the Ordovician and persevered throughout several mass extinction events. Unknown fishes' lines became extinct in life history (e.g., conodonts, ostracoderms, acanthodians, placoderms, etc.). It is so that extant lineages may be …