What are the pores present on the surface of the body of the earthworm called?

What is meant by a tissue?

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

The first body segment of the earthworm is the _____

Where are the male genital pores present in earthworm?

Frogs show sexual dimorphism. True or false?

What does the question mark in the given diagram represent?

What lies between the medulla oblongata and spinal cord in frogs?