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a structure that is used by molluscs for feeding. It is a minutely toothed, chitinous ribbon that is used for scraping or cutting food before it enters the oesophagus. It is unique to the molluscs, and is found in every class of mollusc except the bivalves.
specialised cells which secrete mucus, usually found together with columnar epithelium and...
damage caused to the vegetation when it is intensively fed upon by grazing animals and does not...
the effect of the relative lengths of daylight and darkness on the physiology and behaviour of...
the form in which carbon dioxide is transported in red blood cells.