Among the following organisms, which one does not belong to the class

Among the following organisms, which one does not belong to the class of other three?

[amp_mcq option1=”Crab” option2=”Mite” option3=”Scorpion” option4=”Spider” correct=”option1″]

This question was previously asked in

UPSC IAS – 2014

The correct answer is A) Crab. We need to classify the given organisms to find the one that belongs to a different class from the others.

– All four organisms (Crab, Mite, Scorpion, Spider) belong to the phylum Arthropoda.
– Within Arthropoda, they are further classified into classes.
– Crab belongs to the class Malacostraca, which is part of the subphylum Crustacea.
– Mite, Scorpion, and Spider all belong to the class Arachnida.

Arachnids are characterized by having eight legs (four pairs), no antennae, and body divided into two segments (cephalothorax and abdomen). Crustaceans, like crabs, typically have ten legs (five pairs, including claws), two pairs of antennae, and usually a body divided into cephalothorax and abdomen, often covered by a carapace.

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