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The phenomenon in which better developed larva changes to less developed adults is
Option: 1
Retrogressive metamorphosis
Option: 2
Neoteny
Option: 3
Progressive metamorphosis
Option: 4
Both 1 and 2
Answers (1)
The adult tunicates have only one feature of chordates, i.e., pharyngeal gill slits. The notochord, nerve cord and postanal tail disappears in adults. This is called regressive metamorphosis.
Hence, the correct option is (a).
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