What simple invertebrate lacks true tissues and organs, and is often found attached to rocks in the ocean?
Sponge
What radially symmetrical invertebrate group possesses stinging cells called cnidocytes, and includes jellyfish, corals, and sea anemones?
Cnidaria
What is the name given to the process by which insects shed their exoskeleton to grow?
Molting
Which invertebrate group, often parasitic, is characterized by a flat body and includes tapeworms and flukes?
Platyhelminthes
What do we call the larval stage of a butterfly or moth?
Caterpillar (or larva)
