In how many parts is the body of the frog divisible?

Which of these is not present in frog?

In which abdominal segment are the anal cerci present in cockroach?

What is the function of typhlosole in earthworm?

Identify the correct pathway of food ingested by an earthworm.

Respiratory exchange in earthworms takes place through __

The simple epithelium consists of two or more cell layers and has a protective function.

Which of these structures do not help in excretion in cockroaches?