The sensory papillae in frogs are associated with
smell
hearing
taste
touch
Explain how excretion takes place in cockroach ?
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.
Phallic organs in cockroach are related to
Describe the structure of oothecae in cockroach.
The blood of cockroach contains no respiratory pigment. It means that