Consider the following statements regarding cockroach and mark the correct option.
$(i)$ Head is formed by the fusion of $6$ -segments.
$(ii)$ Mouth parts are biting and chewing type.
$(iii)$ Crop is the part of mid gut.
Only $(ii)$ is correct
$(ii)$ and $(iii)$ are correct
$(i)$ and $(ii)$ are correct
Only $(iii)$ is correct
Structure made up of chitin in cockroach
Explain how excretion takes place in cockroach ?
Which one of the following is one of the paths followed by air or $O_2$ during respiration in the adult male Periplaneta americana as it enters the animal body?
It is part of male cockroach
Give names of female and male organs located in abdomen of cockroach.