two distinctive characters of Heteroneries
Answers
:- initial segments fused to form head consisting of eyes and peristomium. Prostomium contains prostomial tentacles, ocelli and palps. Parapodiacontain additional foliaceous lobes and setae become oar like. Reduction of muscles and alimentary canal is observed due to development of gonads
Answer:
A free-swimming dimorphic sexual individual of certain polychaete worms (family Nereidae) characterized by greatly enlarged eyes, enlarged and modified parapodia, and other appendages, and more or less complete obliteration of the internal viscera by masses of developing germ cells. Externally the body of both male and female individuals show a distinction between modified posterior and unmodified anterior somites which is a characteristic feature of Nereis.
Explanation: