Question

Write on the alternation of generation in coelenterata with example ?

Answer 1

Alteration of generation means life cycle that changes in between two forms the asexual  and sexual. one form give rise to another form. FOR EXAMPLE, a polyp do asexual reproduction to produce medusa. and medusa is a sexual stage class hydrozoa has multiple examples of alteration of generation. But the best example is of OBELIA because it has equally balanced forms.