Question

Describe the reproduction in unio write a note on the significance of glochidium larva

Answer 1

Although most bivalve species are gonochoristic (that is, they are separated into either male or female members) and some species are hermaphroditic (they produce both sperm and eggs), sexual dimorphismis rare. In gonochoristic species there is usually an equal division of the sexes. Simultaneous hermaphroditism occurs when sperm-producing tubules and egg-producing follicles intermingle in the gonads (as in the family Tridacnidae), or the gonads may be developed into a separate ovary and testis, as in all representatives of the subclass Anomalodesmata.