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A coastal region experiencing two high tides and two low tides per day is (?).

A tidal bore is best described as which of the following?

The medusa form of the class Cubozoa has given rise to its common name of ___________________ . 

The term “Errantia” describes annelids that move around and have a polychaete body plan.

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 _____________________