Squids have a closed circulatory system composed of __________ heart(s).

The largest, most successful class of animals on Earth:

Tick can carry many diseases, including:

The Molluscan class “Gastropoda” includes which of the following organisms?

The term “Arthropoda” means:

This term describes an appendage with two branches; one branch being the gill, the other branch being the leg:

Brittle Stars belong to which class of Echinoderms?

The minerals and collagen found in bone provide the strength to protect organs and tissues.  What major theme of biology does it represent?

Arthropod appendages are adapted for all of the following except:

With type I diabetes, the cells in the pancreas do not produce enough insulin (a hormone) to lower glucose levels in the blood. What major theme of biology does it represent?