Question

select the incorrect option about pleurobrachia.
a)they are diploblastic
b)they have tissue level organisation
c)they have comb plates
d)they are triploblastic

Answer 1

Answer:

Pleurobrachia are not triploblastic.

Explanation:

• A little, oval to spherical comb jelly with two long fishing tentacles, Pleurobrachia pileus grows up to 1-2.5 cm tall.
• The fishing tentacles include lateral filaments, can retract entirely into the body, and can be up to 15-20 times the length of the body (up to 50 cm long).
• Eight longitudinal combs, placed in four paired rows, are attached to it while it swims, giving the comb jellies (ctenophores) their distinctive shimmering appearance.
• These combs have plates made of transverse rows of hairs that beat downwardly in waves, giving the appearance of shimmering.
• At night, these plates glow phosphorescently.
• The intestines might be colored. Specimens that have just hatched are pear-shaped and only have a few short rows of combs.

Hence, option (d) is correct.

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