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Q. What kind of exoskeleton do some molluscs present?
Some molluscs, like gastropods and bivalves secrete an external calcareous carapace (the shell). Calcium carbonate is a fold in the epidermis, secreted by the mantle, forming the shell.
In pelecypods, the shell is made of two valves that contain and articulate the individual body within. In gastropods the shell contains only part of the body the visceral mass.
Tests of shelled amoebas are made from a variety of substances including sand grains, chitin and substrate, calcium salts, and even silica. These shells still accumulate in ocean d
what is almentary canal
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Q. Prevention of Outbreak in salmonellosis? Prevention of Outbreak: The control of food borne salmonella infection requires the following: 1. Preventing food contamination
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Q. What is Echocardiography? Ans. Echocardiography has become an established and powerful tool for diagnosing presence of CAD and defining its consequence. It can help in
List three important discoveries that resulted from the Human Genome Project. Answers should contain three of the following: Only about 2 percent of the human genome encodes p
Q. What is the morphological characteristic that evolutionarily approximates the beings of the phylum Annelida to arthropods? The metameric feature that is the body segmentatio
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