Question

UPSC Prelims 2014 Question

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

  1. 1. Crab
  2. 2. Mite
  3. 3. Scorpion
  4. 4. Spider

Answer (Detailed Solution Below)

Option 1: Crab

Detailed Solution

Explanation: 

  • Crabs belong to the category of crustaceans while Mite, Spider and Scorpion belong to the category of Arachnids.

  • Crustaceans range in size from the Japanese spider crab, which can grow to more than four meters (13 feet), to tiny, microscopic copepods.

  • All living arthropods have two key characteristics in common: hard exoskeletons and legs with joints. That last should come as no surprise. Arthropod means “jointed foot” in Greek.

Therefore, option (1) is the correct answer. 

Subject: Environment | Plant and Animal Anatomy

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