A) loss notochord
B) loss tail
C) experience reduction of nervous system to a visceral ganglion
D) all of the above
Correct Answer: D
Solution :
The larva (tadpole) undergo retrogressive metamorphosis i. e., change from better developed larva to less developed adult e.g., Herdmania. The notochord is only present in the tail of larva and diasppear in adult.
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