Porifera Cnidaria

What type of symmetry do sponges (Porifera) have?

• asymmetrical

• radial

• bilateral

• medial

What is the outer most layer of Porifera?

• epidermis

• gastrodermis

• mesoglea

• spongin

What type of symmetry do cnidarians have?

• asymmetrical

• radial

• bilateral

• medial

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

• Spongin

• Amoebocytes

• Spicules

• Nematocysts

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.

• An incomplete digestive tract consisting of one opening.

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.

What are the organelles inside the stinging cells that inject paralyzing toxins into their prey?

• pinacocytes

• lysomatocyts

• choanocytes

• nematocysts

Which part of the sponge body is a large opening at the top of the central cavity through which water leaves the sponge?

• meenchyme

• Spongecoel

• Osculum

• Ostia

Members of the what phylum include sea anemones and coral?

• Animalia

• Cnidaria

• Porifera

• Plantae

What creates the flow of water in a sponge?

• pores

• osculum

• collar cells

• amoebocytes