What is true about Nereis, Scorpion, Cockroach and Silver fish __________________.

They all have jointed paired appendages

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They all posses dorsal heart

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None of them is aquatic

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They all belong to the same phylum

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Solution

The correct option is B They all posses dorsal heart
Nereis is a genus of polychaete worms belonging to the phylum Annelida. While scorpion, cockroach and silverfish belong to the phylum Arthropoda whose characteristic is having jointed paired appendages. So option A and D are wrong. Scorpion is aquatic. So option C is also wrong. The similarity between all these organisms is that they all possess a dorsal heart. Therefore, the correct answer is option B.

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