Life in water

April 2007
Water (9781405318747);2007, p14
Book Chapter
A chapter from the book "Water" is presented. It discusses the different life forms present in the Earth's ocean system. It notes the scientific theory which suggests that the first life forms on Earth evolved more than 3.5 billion years ago at the edges of oceans. The chapter cites that the density and weight of water makes it an effective support environment for small and large organisms. Also explained are the characteristics and features of marine life like plant plankton, and bony and cartilaginous fish.


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