Structural Organisation Questions

Earthworms have no skeleton, but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. This is due to:

Ureters act as urinogenital ducts in:

Which one of the following structures in $\text{Pheretima}$ is correctly matched with its function?

The four sketches (A, B, C and D) given below represent four different types of animal tissues. Which one of these is correctly identified along with its correct location and function?

Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D:

The supportive skeletal structures in the human external ears and in the nose tip are examples of: