Which of these is not a characteristic feature of Rana tigrina?

How many legs are there in each thoracic segment of a cockroach?

Which of these is characteristic of hindwings of a cockroach?

Which of these structures is dorsal in male cockroach?

Which of the following is not true about nephridia in earthworm?

Which of these is not a structural classification of simple epithelium?

In how many regions, is the body of earthworm divisible?

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