a)
The entire body of cockroach is covered by a hard brown Coloured chitinous exoskeleton.
b)
The body is segmented and distinctly divisible into three parts
1. Head
2. Thorax
3. Abdomen.
c) Three pairs of legs are present. Each leg consists of five segmented. Jointed legs are present.
d) Prawn, scorpion, grasshopper, ant, mosquito have jointed legs.