Invertebrates

Invertebrates are....

• animals WITH a backbone

• animals WITHOUT a backbone

Some invertebrate groups are...

• mollusks, mammals, birds

• Fish, mollusks, arthropods

• Arthropods, mollusks, annelids

Sea stars and sea urchins do not have back bones

• True

• False

Worms and insects are similar in that they both belong to the invertebrate group

• True

• False

All invertebrates have hard shells...

• true

• false

Aracnids, insects, and crustaceans are invertebrates and arthropods.

• True

• False

An arthropod has jointed appendages

• True

• False

Worms are also arthropods

• True

• False

Aracnids have 6 legs while insects have 8 legs

• True

• False

Arthropods breathe using gills ONLY.

• True

• False