Which of the following is a correctly matched | vedclass

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(B) The correct pair is $Hydra - 	ext{Nerve net}$.$1$. Sponges (Porifera) do not have specialized excretory canals; they use water transport systems.

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Hydra - Nerve net

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(B) The correct pair is $Hydra - 	ext{Nerve net}$.$1$. Sponges (Porifera) do not have specialized excretory canals; they use water transport systems.$2$. Hydra (Cnidaria) possesses a primitive nervous system consisting of a diffuse nerve net.$3$. Earthworms (Annelida) use nephridia for excretion, not green glands (which are found in crustaceans like prawns).$4$. Starfish (Echinodermata) do not have a mantle cavity; this is a characteristic of Mollusca.

Which of the following is a correctly matched pair?

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