Animals that do not have backbones are

• echinoderms

• cnidarians

• invertebrates

• mammals

A type of worm that may have an eye spot on its head.

• sponge

• flatworm

• roundworm

• mollusk

Tags

NGSS.MS-LS4-2

An invertebrate with an exoskeleton, segmented body, and pairs of jointed appendages

• arthropod

• mollusks

• echinoderm

• sponge

An invertebrate with stinging cells and a central body cavity

• mollusks

• cnidarian

• segmented worm

• sponge

An invertebrate with an internal skeleton and fluid-filled tube:

• sponge

• cnidarian

• echinoderm

• arthropod

Tags

NGSS.MS-LS4-2

A type of worm that looks like a thin tube.

• flatworm

• segmented worm

• roundworm

Tags

NGSS.MS-LS4-2

An animal with a soft, unsegmented body often protected by a hard shell:

• mollusk

• cnidarian

• sponge

• segmented worm

Tags

NGSS.MS-LS4-2

An asymmetrical animal without tissues or organs:

• SpongeBob SquarePants

• sponge

• roundworm

• cnidarian

The simplest animal with a brain:

• roundworm

• smartworm

• segmented worm

• flatworm

Jellyfish are examples of a group of animals called: