Question

Answer in detail.

Name the different classes of arthropods. Write one characteristic feature of each class.

Answer 1

Arthropods are invertebrates with jointed legs, a segmented body, and a bilaterally symmetrical body that is divided into head, thorax, and abdomen.
Anthropods are further classified into – 

1. Arachnids – They have fused head and thorax, four pairs of legs, hard exoskeleton, no wings, and antennae. Examples: Scorpions and spiders.
2. Crustaceans – They have fused head and thorax, appendages on all segments, a variable number of jointed legs, and two pairs of antennae extending from the head. Examples: lobsters and sprimps.
3. Myriapods – Body divided into a large number of segments and have two pairs of legs per segment (example: millipede) or one pair of legs per segment (Example: centipede). The number of legs may vary from 20 to 200.
4. Insects – Their body is divided into head, thorax, and abdomen. They have three pairs of legs, two pairs of wings (some have one pair or none), and a pair of antennae. Examples: ants and butterflies.