Spiders and scorpions belong to the subphylum Chelicerata. Which of the following do they LACK?
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Correct answer: Antennae or antennules
Chelicerates (arachnids, horseshoe crabs, and sea spiders) are the only arthropod subphylum that lacks antennae entirely. Their first pair of appendages are the chelicerae — specialized pincers or fangs used in feeding and defense.
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