Apologia Biology Module 12 Arthropods 1

On an insect, the thorax is the region between the _______ and the ______?

• Head, abdomen

• Head, cephalothorax

• Cephalothorax, abdomen

The body region comprised of the head and thorax together is called...

• telson

• rostrum

• cephalothorax

An organism moves its joints with muscles that lay on top of the joints. Is the organism an arthropod?

• Yes

• No

Why do we say that arthropods are constantly bleeding internally?

• They have a ventral nervous system

• They have an open circulatory system

• They do not have red blood

What structures are vitally important for respiration in a crayfish.

• Gills and gill chambers

• statocyst

• esophogus

• maxilae

A crayfish loses its claw in a fight. What happens?

• It will bleed to death

• It will be crippled for the rest of its life

• It will grow a replacement

Which of the following are characteristics of arachnids? Select all that apply.

• two antennae

• book lungs

• usually 4 pair of eyes

• cephalothorax

• three body regions

All spiders have spinnerets and silk glands, true or false?

• True, but not all spiders spin webs.

• False, not all spiders can produce silk.