What is retrogressive metamorphosis? Mention its significance. Biology discussion?
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metamorphosis and retrogressive ...
Retrogressive metamorphosis is an attribute of urochordata where an aquatic, free swimming larva with notochord changes into a sessile, nonchordate adult. This kind of metamorphosis includes total loss of advanced characters present in larval stage.
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Metamorphosis is a change from the juvenile to adult stage in which larval stage is quite different from the adult stage. In retrogressive metamorphosis the larva possesses advanced characters which are lost during the development and the adult is either sedentary or degenerated with primitive characters.
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