Which of the following is an example of Arachnida?

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Multiple Choice

Which of the following is an example of Arachnida?

Explanation:
Understanding which animals are Arachnida relies on body plan traits: eight legs, two main body sections, and no antennae. A spider fits exactly: it has eight legs, a two-part body (cephalothorax and abdomen), and no antennae or wings. The other options come from different groups: a crab is a crustacean with a segmented body and antennae; a beetle is an insect with six legs, three body parts, and typically wings; a centipede is a myriapod with many legs and usually antennae. So the spider is the example of Arachnida.

Understanding which animals are Arachnida relies on body plan traits: eight legs, two main body sections, and no antennae. A spider fits exactly: it has eight legs, a two-part body (cephalothorax and abdomen), and no antennae or wings. The other options come from different groups: a crab is a crustacean with a segmented body and antennae; a beetle is an insect with six legs, three body parts, and typically wings; a centipede is a myriapod with many legs and usually antennae. So the spider is the example of Arachnida.

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