Show:
Sponges & Cnidarians
Mollusks & Echinoderms
Earthworms
Arthropods
Miscellaneous
100

All invertebrates have no ______________.

What is backbone?

100
Starfish have this type of symmetry.
What is radial?
100
Tiny bristles an earthworm uses for movement.
What is setae?
100
An insect's life cycle, which includes changes in body form.
What is metamorphosis?
100
This is the type of symmetry flatworms have.
What is bilateral?
200
Spicules, collar cells, and flagella are all parts of __________.
What is sponges?
200
How clams obtain food.
What is by filtering food from the water?
200
The type of circulatory system earthworms have.
What is closed?
200

The two main characteristics of arthropods.

What are exoskeletons and jointed appendages?

200

What best describes the skin of echinoderms?

scales, smooth, or spiny

spiny 

300

This type of skeleton is supported and shaped by water (jellyfish)

What is hydrostatic?

300
Animals that have two shells hinged together are called _____________.
What are bivalves?
300
The chamber in the earthworm's digestive system that grinds food during mechanical digestion.
What is the gizzard?
300

How many pairs of legs do insects have?

What is 3?

300
The four stages of metamorphosis. (In order from earliest to latest stage.)
What is egg, larva, pupa, and adult?
400
The stinging cells of a hydra or jelly fish.
What are nematocysts?
400

Clam shell is formed by this

What is the mantle?

400

The structures that control the blood pressure in an earthworm.

What are the aortic arches?

400
The three sections of an insect.
What is the head, thorax, and the abdomen?
400
A collection of nerve tissue called a "simple brain".
What is ganglion?
500

Two body types of Cnidarians

Medusa and polyp

500
This type of animal has tube feet in its water-vascular system.
What is starfish?
500

Earthworms carry on respiration through this part of their body.

What is epidermis or skin?

500

Two structures that make up the respiratory system in insects.

What are the tracheae and spiracles?

500

Part of the earthworm's circulatory system that acts as the heart.

What is the dorsal blood vessel?