Question

Cnidarians and ctenophores has which of following common features?

• A. Presence of mesoglea
• B. Carnivory
• C. Bioluminescence
• D. All of the above

Answer 1

The correct option is D All of the above

Ctenophores or the comb jellies are the voracious marine predators, feeding mostly on plankton. They are mainly composed of inert mesoglea, which causes them to have a low rate of metabolism.
Some species of cnidaria are with true triploblastic tissue arrangement and/or mesoderm and mesoglea still persists with some specialised cells embedded within the gelatinous matrix. The cnidarians are either carnivorous or omnivorous filter feeders. Also, bioluminescence is widespread among the Cnidaria.

So, the correct answer is option D.