The primary difference in reptile and amphibian skin is that reptiles have scales that contain keratin. 

What is the function of the cardiac stomach in starfish? 

Box jellyfish venom can be highly toxic. What is its functional mechanism? 

Adductor muscles are used to control what function of bivalves? 

Which term below describes a type of cnida used for food gathering and defense that consist of spines with toxins. 

Organisms, like those in phylum platyhelminthes, are hermaphroditic. These organisms are capable of self fertilization and do not require a mate for reproduction.  

Gastropods have an open circulatory system. Which of the below statements describes this type of circulatory system? 

Trematodes tend to have complex life cycles that consist of multiple hosts. 

Match the below characteristics to survivorship curves

Which part of a tapeworm is used to anchor it to the host intestines?