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Q.

Which of the following are similar in their basic function?

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a

Nephridia and parapodia – Excretion

b

Air bladder and urinary bladder – Excretion

c

Parapodia and comb plates – Locomotion

d

Tympanum and operculum – Hearing

answer is C.

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Detailed Solution

Parapodia and comb plates are the locomotory structures in annelids and ctenophores respectively.Tympanum helps in hearing while operculum is a lid that covers gills in bony fishes.Air bladder helps in buoyancy while urinary bladder stores urine.Nephridia help in excretion.
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