Question

The biggest class of animal kingdom is

• A. Arthropoda
• B. Insecta
• C. Mammalia
• D. Crustacea

Answer 1

Answer: (B)

Insecta

• Insecta is a class of invertebrates. They are placed within the phylum Arthropoda. The characteristics of group Insecta are that they have six legs or three pairs of legs.
• These legs contain joint segments. The body of an insect is made up of three parts. Each insect has one pair of antennae or feelers which helps the insect to find food.
• They have their body covered with the exoskeleton made up of chitin. Insects have one or two pairs of wings. Insects are cold-blooded. They have no lungs, but small openings on their bodies. Insects lay many eggs. Most insects go through a life cycle called metamorphosis.
• They are among the most diverse groups of animals in the world. There are more than a million species of insects. They are found in all environments. It represents more than half of all living organisms. It is the largest class of animal kingdom.
  

Thus, the correct answer is option B.