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The coelom of leeches has become filled with connective tissue and muscle fibers, preventing them from having a effective hydrostatic skeleton.

Which group of molluscs has mostly lost the radula and switched to filter feeding? ________________________

Swimmer’s itch is caused by the _______________________ of bird flukes that enter human skin instead of their normal final host.

In molluscs, generally, the dorsal body wall folds to form the ____________________

From the human economic viewpoint, which class of molluscs is most likely to be negatively impacted by ocean acidification, and which class is least likely to be impacted, and why?  

A pearl is produced in response to an irritant such as a grain of sand becoming lodged between the shell and the mantle.  The material that makes the pearl is called _____________________

Mock Exam Paper 2_23.01.2026-1.pdf

What is the function of the clitellum in earthworms?

Write down the names of the three parasitic classes of the Phylum Platyhelminthes.

All members of the Class Anthozoa have a [answer1] form as adults, whose gastrovascular cavity is divided internally by an arrangement of paired and unpaired [answer2].