Q92 of 525 Page 254

What is alternation of generation?

Alternation of generation is the phenomenon in which asexual generation (polypoid generation) and sexual generation (medusoid generation) alternate each other in the life cycle.


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90

Name the organisms in which asexual reproduction takes place by budding?

 91

To which phylum do sponges belong?

 93

What is common name of following:

(a) Pleurobranchia and


(b) Cestum.

 9

Give an example of ctenophore.