Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: Arachnids also have two additional pairs of appendages. The first pair, the chelicerae , serve in feeding and defense. The next pair, the pedipalps , help the organisms feed, move, and reproduce. Answer: arachnid
Solution:
What class of invertebrate animals has additional appendages called the chelicerae and the pedipalps?