Which of the following is a class within Arthropoda?

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Multiple Choice

Which of the following is a class within Arthropoda?

Explanation:
The main idea here is understanding taxonomic levels and which groups belong to Arthropoda. Arthropoda is a phylum known for jointed limbs, segmented bodies, and an exoskeleton. Within that phylum, Insecta is a class that encompasses insects. The other names belong to different phyla: Mollusca is a separate phylum (with classes like Gastropoda or Bivalvia), Echinodermata is a phylum of marine animals such as starfish, and Annelida is a phylum of segmented worms. So Insecta is the correct choice because it is a class within Arthropoda.

The main idea here is understanding taxonomic levels and which groups belong to Arthropoda. Arthropoda is a phylum known for jointed limbs, segmented bodies, and an exoskeleton. Within that phylum, Insecta is a class that encompasses insects. The other names belong to different phyla: Mollusca is a separate phylum (with classes like Gastropoda or Bivalvia), Echinodermata is a phylum of marine animals such as starfish, and Annelida is a phylum of segmented worms. So Insecta is the correct choice because it is a class within Arthropoda.

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