Sponges and Cnidarians

Cnidarians have tentacles that grow in a ring around a central mouth in a shape known as:

• Symbiotic

• Planktonic

• Bilateral Symmetry

• Radial Symmetry

Which of the are classified as Cnidarians? (Choose all that apply.)

• Jellyfish

• Anemones

• Sponge

• Shark

Which of the following is NOT true of corals and coral reefs?

• Coral reefs can be exposed to natural stresses and "bleach".

• Coral reefs are only located in Australia.

• Hard corals build reefs which are diverse ecosystems.

• Corals can face danger when people boat near reefs or harvest coral.

The stinging cells of a jellyfish are called:

• Cnidoblast

• Cilia

• Nematocysts

• Zooxanthellae

Reorder the following from the broadest classification to more specific.

(This sequence is missing Genus and Species.)

• Family

• Phylum

• Class

• Kingdom

• Order

The basic structure of the coral organism is:

• Polyp

• Medusa

• Nematocyst

• Cnidoblast

Cnidarians respire using:

• Mouth

• Lungs

• Cell Membranes

• Gills

Which of the following cells are NOT found in a sponge?

• Collar Cells

• Nematocysts

• Amoebocytes

Water and waste exit a sponge through its:

• Ostia

• Nematocysts

• Osculum

• Mouth

The main shape of a jellyfish can be classified as:

• Polyp

• Nerve net

• Medusa

• Nematocyst