https://wiki-pathfindersonline.designerthan.at/index.php?action=history&feed=atom&title=Translations%3AAY_Honors%2FShells_-_Advanced%2FAnswer_Key%2F131%2FenTranslations:AY Honors/Shells - Advanced/Answer Key/131/en - Revision history2026-05-06T06:26:30ZRevision history for this page on the wikiMediaWiki 1.35.5https://wiki-pathfindersonline.designerthan.at/index.php?title=Translations:AY_Honors/Shells_-_Advanced/Answer_Key/131/en&diff=442333&oldid=prevFuzzyBot: Importing a new version from external source2021-04-23T13:05:03Z<p>Importing a new version from external source</p>
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<!-- 6. Explain the development of a shell. How long do mollusks live? --><br />
<gallery perrow=3 widths=200><br />
Image:Cypraea chinensis with partially extended mantle.jpg|The marine gastropod ''Cypraea chinensis'', the Chinese Cowry, showing partially extended mantle<br />
Image:Giant_clam_or_Tridacna_gigas.jpg|The giant clam (''Tridacna gigas'') is the largest extant bivalve<br />
Image:A fossil shell with calcite.jpg|Fossil shell covered in calcite crystals<br />
</gallery><br />
In those molluscs which have a shell, the shell grows gradually over the lifetime of the mollusc by the addition of calcium carbonate to the leading edge or opening, and thus the shell gradually becomes longer and wider, in an increasing spiral shape, to better accommodate the growing animal inside. The animal also thickens the shell as it grows, so that the shell stays proportionately strong for its size.</div>FuzzyBot