External Morphology — Prelims Questions

Which of the following statements about the clitellum of *Pheretima posthuma* is INCORRECT?

In *Pheretima posthuma*, the spermathecal pores are located in the intersegmental grooves of:

Which of the following external features is NOT present in the first segment of an earthworm (*Pheretima posthuma*)?

The perichaetine arrangement of setae is characteristic of:

Dorsal pores in *Pheretima posthuma* are responsible for:

Which of the following structures is NOT a true segment in *Pheretima posthuma*?