Introduction to Invertebrates TEST

Echinoderms are different from most other invertebrates because they have an ___________

• endoskeleton

• exoskeleton

Depending on a mollusk's type, it may use ______ to crawl, dig, or catch prey.

• mantle

• foot

• leg

• mouth

All worms have ___________

• bilateral symmetry

• asymmetry

• radial symmetry

______ have stinging cells and take food into a central body cavity.

• Cnidarians

• Sponges

• Mollusks

• Arthropods

The simplest animals with a brain are _______________

• segmented worms

• hookworms

• faltworms

• roundworms

About _____ percent of all known animal are invertebrates

• 50

• 96

• 90

• 87

Which of the following is not a group of invertebrates?

• sponges

• mollusks

• fishes

• cnidarians

To which group of invertebrates do cephalopods, such as squids, belong?

• arthropods

• echinoderms

• cnidarians

• mollusks

Which of the following are appendages of a bee?

• wings

• eyes

• lungs

• abdomen

Which group of invertebrates uses fluid-filled tubes to move or get food and oxygen?

• cnidarians

• echinoderms

• arthropods

• worms