Which of the following structures represent the nervous system of an earthworm?

Which of the following statements is true about setae present in earthworm?

What is the function of gizzard in earthworm?

Frogs have a lymphatic system. True or false?

What does the question mark represent in the following figure?

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

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

What does the given figure represent?