Chalk and seashells are made of the same stuff. So why is one crumbly and the other tough? If you know that seashells are made of basically the same stuff as chalk, you might have wondered why chalk ...
Shell formation in molluscs begins early in embryogenesis during some stage of archenteron formation. Ultrastructural information on early formation of external shells is available from only a few ...
More carbon dioxide in the air also acidifies the oceans. It seemed to be the logical conclusion that shellfish and corals will suffer, because chalk formation becomes more difficult in more acidic ...
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