Porifera/Cnidaria Review

Sponges are covered in small holes (the namesake of Phylum Porifera) called

• osculum

• pores

• choanocytes

• amoebocytes

Sponges are sessile, meaning that they don't move for most of their life. The only time they do is

• when they're eating

• right before they reproduce

• right before they die

• when they're larvae (babies)

Besides chemical warfare, sponges use tiny spikes called _________ to defend themselves.

• spicules

• spongin

• spongocoel

• choanocytes

If you're holding a sponge in your hand, what part of the sponge are you touching?

• spongin

• spongocoel

• amoebocytes

• choanocytes

Which of these is NOT a part of the sponge that water would pass through?

• pores

• spongocoel

• osculum

• gastrovascular cavity

Which type of cell in sponges traps food in its sticky collar?

• amoebocytes

• nematocysts

• choanocytes

Which type of cell in sponges transports nutrients throughout the body?

• amoebocytes

• nematocysts

• choanocytes

Which type of cell in cnidarians delivers a painful sting?

• amoebocytes

• nematocysts

• choanocytes

Sponges are __________, meaning that they contain both sexes in the same individual.

• tetraploid

• polyploid

• monoecious

• dioecious

The outer layer of a cnidarian makes up the ______, and the inner layer lining the gut makes up the ______.

• endoderm/ectoderm

• ectoderm/endoderm

• mesoderm/ectoderm

• ectoderm/mesoderm