Marine Invertebrates

All segmented worms belong to which animal phylum?

• Nematoda
• Platyhelminthes
• Annelida
• Nemertea

Which class of Mollusks include clams, oysters, and mussels?

• Gastropods
• Bivalves
• Cephalopods
• Arthropods

Which mollusk group does this represent?

• Class Gastropoda
• Class Bivalvia
• Class Cephalopoda
• Class Polyplacophora

The word 'arthropod' means...

• eight foot
• jointed foot
• flexible foot
• hard foot

All arthropods have segmented bodies, jointed appendages, and ________________. 

• tails
• lungs
• wings
• an exoskelton

Which of the following is a correct description of the polyp body form?

• It is sessile and the tentacles and mouth point downward.
• It is sessile and the mouth and tentacles point upward.
• It is mobile and the tentacles and mouth point downward.
• It is mobile and the tentacles and mouth point upward.

Phylum Porifera is known as 

• "stinging cells"
• "Tentacles"
• "Cleaners"
• "Sponges"

To which group of mollusks does this animal belong?

• Class Gastropoda
• Class Bivalvia
• Class Cephalopoda
• Class Polyplacophora

What type of symmetry do sponges (Porifera) have?

• asymmetry
• radial
• bilateral 
• medial

Phylum Cnidaria is known as 

• "stinging cells"
• "Tentacles"
• "Cleaners"
• "Sponges"