Biology, 25.07.2019 16:00, mihir50

Arthropod exoskeletons and mollusc shells both arthropod exoskeletons and mollusc shells both completely replace the hydrostatic skeleton retain moisture in terrestrial habitats are comprised of the polysaccharide chitin are secreted by the mantle

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Arthropod exoskeletons and mollusc shells both arthropod exoskeletons and mollusc shells both comp...