breathing

27 05, 2017

How do animals breathe? Respiration, Evolution, Biology

By |2018-04-21T11:56:44-07:00May 27th, 2017|Biology|Comments Off on How do animals breathe? Respiration, Evolution, Biology

Fish gills The first cells, which evolved about 3.8 billion years ago, needed carbon dioxide to live and not oxygen. They needed the carbon dioxide to help them break down [...]

26 05, 2017

Lungfish – Evolution of Fish

By |2019-11-19T21:22:15-08:00May 26th, 2017|Biology|Comments Off on Lungfish – Evolution of Fish

Evolution of fish: a lungfish Why did fish leave the water? About 400 million years ago, during the Devonian period, the Earth was going through an especially warm period. Some [...]

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