Classification of arthropods

Which of the following is NOT a characteristic of arthropods?

• Exoskeleton

• Jointed appendages

• Segmented body

• Endoskeleton

What two characteristics do all Arthropods have?

• two legs per body segment

• jointed legs and a cephalothorax(the head and the thorax fused together)

• 3 body segments and metamorphosis

• jointed legs and segmented bodies

How many main body parts do most arthropods have?

• Sixteen

• Three

• One

• Four

Crustaceans are the only arthropods that have

• hard outer shells

• two or three body segments

• two pairs of antennae

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?

• Whip Scorpion

• Wind Scorpion

• Daddy long legs

• Scorpion