___________ are tiny hard particles that give a sponge support and can provide protection if they are made out of calcium carbonate or silica glass.

These sponge cells have sticky, funnel-shaped collar to collect food particles and a flagellum that creates a water current

How do sponges obtain food?

This file-like ribbon of "teeth" is used by molluscs to scrape algae and other food off of rocks and can even drill through the shells of prey.

This is the outer fold of skin on molluscs, and is responsible for excreting the substance that forms the mollusc's shell.

Since the exoskeleton limits the growth of arthropods, they have to shed their exoskeletons and form a new one. This is called ____.

The term 'arthropod' literally means

decapods have ______ legs.

Which of the following is NOT a characteristic of arthropods?

What does the term echinoderm mean?

What type of symmetry do most adult echinoderms exhibit?

Sea stars feed by

How do sea cucumbers defend themselves?

The structure used by sea urchins to chew into rock or coral and to eat kelp is called

This echinoderm can have up to 200 arms and is a suspension feeder:

The bulblike sac on the top of each tube foot helps extend and retract them:

Segmented worms are known as

What is the spear like appendage on the head of ribbon worms that are used for killing prey?

What three types of worms are in the Phylum Platyhelminthes (Flat worms)?

These worms are parasitic of intestinal tracts of marine fish, marine mammals and even humans.