Arachnida have which of the following structures in place of antennae?

Chelicerae

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Pedipalpi

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Mandibles

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Mandibles and wings

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Solution

The correct option is A Chelicerae
The chelicerae are the mouthparts of the Chelicerata, an arthropod group that includes arachnids, horseshoe crabs and sea spiders. Some even contain venom glands and are used to inject venom into the prey or a perceived threat which is in the place of antennae.
Therefore, the correct answer is option A.

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