What key feature separates Class Arachnida from Class Insecta?
Answer
Eight legs and lack of antennae
Spiders belong to the Class Arachnida, which is specifically defined by having eight legs and notably lacking antennae and wings, traits commonly found in the Class Insecta. Furthermore, arachnids typically possess chelicerae, which are specialized mouthparts often ending in fangs, serving as a critical anatomical distinction separating them from insects which usually possess mandibles and antennae for sensory input.
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