[Campbell Biology P.758] Which of the following is a distinguishing characteristic of crusta... | Practice Question

Which of the following is a distinguishing characteristic of crustaceans, as described in the provided text?

  • A: They are the only arthropods with two pairs of antennae.
  • B: All crustaceans regulate salt balance primarily through gills.
  • C: They are exclusively found in marine and freshwater environments.
  • D: Unlike their terrestrial relatives (insects), crustaceans have appendages on their post-genital region or 'tail'.

Explanation

The text explicitly states: 'The anterior-most appendages form two pairs of antennae; crustaceans are the only arthropods with two pairs.' This confirms that having two pairs of antennae is a unique characteristic of crustaceans among arthropods.