Poriferia and Cnidaria

Which of these is a picture of a choanocyte?

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The large opening at the top of the sponge is called the

• Osculum

• Porocyte

• Spicule

• Spongocoel

What are stinging organelles with a coiled thread found in the tentacles which are used to capture prey or defend against predators?

• cnidocytes

• nematocytes

• choanocyte

• pinacocytes

What kingdom do jellyfish and sponges belong to?

• Cnidaria

• Animalia

• Chlorophyta

• Porifera

This picture of a sea anemone would represent which form of a Cnidarian?

• Larval

• Polyp

• Medusa

• Free-swimming

The hard "skeleton" structures in a sponge are called...

• Spongin
• Spicules
• Amebocytes
• Pinococytes

What kind of symmetry does a Cnidarian have?  

• No Symmetry 
• Bilateral Symmetry 
• Radial Symmetry 
• Square

Which of the following is a correct description of the Cnidarian digestive tract?

• A complete digestive tract consisting of two openings.
• A complete digestive tract consisting of one opening
• An incomplete digestive tract consisting of two openings.
• contains only a mouth and an internal cavity.

What phylum of invertebrates does the following picture belong?

• Platyhelminthes
• Cnidaria
• Porifera
• Mollusca

What do organisms from the phylum Porifera eat?

• small marine fish
• plankton,bacteria, and detritus
• choanocytes
• krabby patties