Arthropods, Mollusks, and Echinoderms

Which of the following is the largest group of animals?

• sponges

• humans

• arthropods

• mollusks

How many main body parts do most arthropods have?

• 16

• three

• one

• four

What do jointed limbs help arthropods do?

• move

• hunt

• fight

• sleep

Where is an exoskeleton located?

• in the head

• inside the body

• inside the bones

• outside the body

A feeler that senses touch, taste, or smell is known as a(n)

• mandible

• antenna

• chelicerae

• cephalothorax

A mouth part that can pierce and suck food is called a(n)

• mandible

• antenna

• chelicerae

• cephalothorax

The head and thorax of a spider are called the

• mandible

• antenna

• chelicerae

• cephalothorax

Crustaceans use ______________________to breathe.

• insect

• cephalothorax

• gills

• antenna

Which letter represents the caterpillar becomes a pupa?

• A

• B

• C

• D

• E

What makes crustaceans different from other arthropods?

• they have 2 pairs of antennae

• they have two compound eyes

• they have mandibles

• they can't fly