Question

Which is the arthropod with three pairs of legs?
1. Insecta
2. Myriapoda
3. Arachnida 
4. Crustacea

Answer 1

Correct Answer - Option 1 : Insecta

The correct answer is Insecta.

• Insecta is the arthropod with three pairs of legs.

Arthropods

• An arthropod is an invertebrate animal having an exoskeleton, a segmented body, and paired jointed appendages.
• Arthropods form the phylum Euarthropoda, which includes insects, arachnids, myriapods, and crustaceans.
  • Insecta
    • Insects or Insecta are pancrustacean hexapod invertebrates and the largest group within the arthropod phylum.
    • Insects such as ants, dragonflies, and bees.
  • Crustaceans
    • ​Crustaceans are a highly diverse animal group with respect to morphology, physiology, life history, and ecological adaptation. 
    • Crustaceans such as crabs, lobsters, and shrimp.
  • Myriapoda
    • Myriapoda is a subphylum of terrestrial arthropods, characterized by an elongated body with many segments, typically many legs, a single pair of antennae, and simple eyes. 
    • Myriapoda means “many feet” such as centipedes and millipedes.
  • Arachnida
    • Arachnida includes orders containing spiders, scorpions, ticks, mites, harvestmen, and solifuges.
    • Arachnida is a class of joint-legged invertebrate animals, in the subphylum Chelicerata.

​

• Father of taxonomy - Carl Linnaeus.
• R. H. Whittaker proposed an elaborate five-kingdom classification – Monera, Protista, Fungi, Plantae, and Animalia.
• Thomas Cavalier-Smith proposed an elaborate seven-kingdom classification – Kingdom, Phylum, Class, Order, Family, Genus, and Species.