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How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes?
Annelids have a nervous system made of two ventral chords and one relatively big nervous cell concentration in its anterior portion resembling a primitive brain.
Nematodes have an anterior neural ring connected to two neural chords, a ventral and a dorsal one, while in planarias (platyhelminthes) there are only two small anterior "cerebral" ganglia from which neural chords split. Cephalization in annelids thus is more outstanding than in nematodes or in flatworms.
Gorgonids yield chemicals like prostaglandins, medically useful for birth control, prevention of peptic ulcers, treatment of asthma, regulation of blood pressure, etc. Sponges are
name of enzyme that mostly used in industrial biotechnology?
Define about the Geriatric Nutrition? Aging has been defined as "a series of time related process that ultimately brings life to a close." Persons of 60 years of age and older
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Closed Mitral Valvotomy : This has been 1-eplaced by balloon mitral valvotomy (BMV) in most centres. It is done in cases of either pure mitral stenosis or with .triv
Q. How are the three major arthropod classes characterized according to the presence of wings? Arachnids and Crustaceans do not have wings. Most insects have wings.
Define the Assessment of Copper Status in Humans? A reliable index to assess marginal copper status is currently not available. However, severe copper deficiency may be detecte
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ISOZYMES : an enzyme having different molecular forms but catalyzing the same reaction.
Environment impact assessment (EIA) is a tool used for decision making regarding developmental projects and programmes and it may be defined as formal process used to predict the e
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