Ctenophorans have/show

Cnidarians and Ctenophorans are both diploblastic. Which other character do they have in common, which is not found in other phyla?

Non-archegoniates embryophytes have/show

Non-archegoniates embryophytes have/show

plants with kranz anatomy do not have/show

plamts with kranz anatomy do not have/show

Choanocytes are peculiar cells found in ctenophorans/sponges.

Gemmule formation occurs in (a) helminthes (b) Ctenophorans (c) Cnidarians (d) Poriferans

Choose the correct alternative: Choanocytes are peculiar cells found in ctenophorans/sponges.

The larval form present in ctenophorans is

If two-empty sets A and B have n elements in common, then show that AxxB and BxxA have n^(2) elements in common.