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At retrogressive metamorphosis, the urochordate larva
- a)loss notochord
- b)loss tail
- c)experience reduction of nervous system to a visceral ganglion
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
At retrogressive metamorphosis, the urochordate larvaa)loss notochordb...
Retrogressive metamorphosis is a process that occurs in some urochordate species, in which the larval form undergoes a series of regressive changes to become the adult form.
Loss of Notochord:
- One of the regressive changes that occurs during retrogressive metamorphosis is the loss of the notochord, which is a rod-like structure that provides support to the body of the larva.
- The notochord is present in the larval stage but is lost during metamorphosis as the adult form does not require it for support.
Loss of Tail:
- Another regressive change that occurs during retrogressive metamorphosis is the loss of the tail.
- The tail is present in the larval stage but is lost during metamorphosis as the adult form does not require it for locomotion.
Reduction of Nervous System:
- During retrogressive metamorphosis, the nervous system of the urochordate larva undergoes a reduction to form the visceral ganglion.
- The visceral ganglion is a simplified version of the nervous system that is present in the adult form of the urochordate.
All of the Above:
- Therefore, the correct answer is option D as all the above changes occur during retrogressive metamorphosis in urochordate larvae.
Loss of Notochord:
- One of the regressive changes that occurs during retrogressive metamorphosis is the loss of the notochord, which is a rod-like structure that provides support to the body of the larva.
- The notochord is present in the larval stage but is lost during metamorphosis as the adult form does not require it for support.
Loss of Tail:
- Another regressive change that occurs during retrogressive metamorphosis is the loss of the tail.
- The tail is present in the larval stage but is lost during metamorphosis as the adult form does not require it for locomotion.
Reduction of Nervous System:
- During retrogressive metamorphosis, the nervous system of the urochordate larva undergoes a reduction to form the visceral ganglion.
- The visceral ganglion is a simplified version of the nervous system that is present in the adult form of the urochordate.
All of the Above:
- Therefore, the correct answer is option D as all the above changes occur during retrogressive metamorphosis in urochordate larvae.
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Community Answer
At retrogressive metamorphosis, the urochordate larvaa)loss notochordb...
Metamorphosis is a change from the juvenile to adult stage in which larval stage is a quite different from adult stage . In retrogressive metamorphosis the larval possesses advanced character which are lost during the development and the adult is either sendentary or degenerated with primitive character
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At retrogressive metamorphosis, the urochordate larvaa)loss notochordb)loss tailc)experience reduction of nervous system to a visceral gangliond)All of the aboveCorrect answer is option 'D'. Can you explain this answer?
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