CNIDARIANS

What are the two basic body plans of cnidarians?

Polyp and medusa

What specialized cells do cnidarians use to immobilize prey?

Cnidocytes (stinging cells)

Where do most cnidarians live, and what is a notable exception?

Most live in the ocean; a few in freshwater

What is the primary phase of Class Scyphozoa (true jellyfish)?

Medusa stage

How do cnidarians like those in Class Hydrozoa reproduce asexually?

By budding

What is the function of the gastrovascular cavity in cnidarians?

Digestion, exchange of gases, removal of waste material, and discharge of gametes

What is a distinguishing feature of Class Cubozoa (box jellyfish)?

Rectangular or cube-like in form with four tentacles dangling from each corner

What type of skeleton do cnidarians possess to provide structural support?

Hydrostatic skeleton

What is a common example of Class Anthozoa?

Sea fans and red corals

Where are gametes released in Class Scyphozoa?

Into the gastrovascular cavity