Porifera & Cnidaria Review

What type of symmetry do sponges (Porifera) have?

• asymmetrical
• radial
• bilateral 
• medial

What is the outer most layer of Porifera?

• epidermis
• gastrodermis
• endodermis
• mesoglea

What level of organization cnidarians have is...

• specialized cells
• tissues
• organs
• organ systems

Tags

NGSS.MS-LS1-3

What type of symmetry do cnidarians have

• asymmetrical
• bilateral
• radial

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

What surrounds the mouth of Cnidarians?

• guard cells
• pinococytes
• tentacles
• spines

What part of the sponge body is the openings along the sponge's body that allow in water?

• Ostia
• Mesenchyme
• spongecoel
• osculum

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

• Ostia
• Meenchyme
• Spongecoel
• Osculum