Simple Invertebrates

Question 1

Which is an invertebrate?
A. Grasshopper 
B. Cow
C. Man
D. Whale

Answer 1

A. Grasshopper

Question 2

Some invertebrates eat food through their mouths. Others absorb food through their what?

Answer 2

Tissue

Question 3

Invertebrates have three basic body plans, or types of what?

Answer 3

Symmetry

Question 4

What are the three basic body plans for invertebrates?

Answer 4

Bilateral Symmetry (2 halves)

Radial Symmetry (Spokes from center)

Asymmetrical (none)

Question 5

List 2 functions of neurons

Answer 5

Sense environment

Carry messages around body to control an animals actions

Question 6

Ganglion

Answer 6

A concentrated mass of nerve cells

Question 7

Gut

Answer 7

A pouch where food is digested

Question 8

Coelem

Answer 8

The body cavity that surrounds the gut

Question 9

Are sponges simple or complicated?

Answer 9

Simple

Question 10

Why are sponges considered animals not plants?

Answer 10

They can’t make their own food (heterotrophs)

Question 11

Describe the special way sponges bring oxygen and food into their bodies

Answer 11

A sponge sweeps water into its body through pores

Question 12

If a part of the sponge breaks off the sponge can what?

Answer 12

Regenerate

Question 13

Do sponges reproduce sexually or asexually?

Answer 13

Both

Question 14

What traits do all cnidarians have in common?

Answer 14

Can regenerate

Question 15

What are the 2 body forms of cnidarians?

Answer 15

Medusa and Polyp

Question 16

What is the difference between a medusa and a polyp?

Answer 16

Medusa - swim freely

Polyp - attach to surface

Question 17

Polyp or Medusa

Jellyfish

Answer 17

Medusa

Question 18

Polyp or Medusa

Hydrozoan

Answer 18

Polyp

Question 19

Polyp or Medusa

Sea Anemone

Answer 19

Polyp

Question 20

What polyps build massive underwater reefs?

Answer 20

Corals

Question 21

What distinguishes flatworms from other worms?

Answer 21

They are the simplest worms

Question 22

All flatworms have what?

Answer 22

Bilateral symmetry

Question 23

What are the bumps on the side of a a flatworms head?

Answer 23

Sensory lobes

Question 24

What is a roundworm’s body shaped like?

Answer 24

Piece of spaghetti

Question 25

How can round worms be helpful?

Answer 25

Break down dead tissues of plants which make soil

Question 26

What worms do you see after a rainfall?

Answer 26

Earthworms

Question 27

Use tentacles to grab food A. Snails and Slugs B. Octopuses and Squids C. Clams and Oysters

Answer 27

B

Question 28

Use grills to filter food A. Snails and Slugs B. Octopuses and Squids C. Clams and Oysters

Answer 28

C

Question 29

Use a radula to scrape food A. Snails and Slugs B. Octopuses and Squids C. Clams and Oysters

Answer 29

A

Question 30

Mollusk have a complex (blank) to control breathing, movement, and digestion

Answer 30

Ganglia

Question 31

Octopuses and squids have the most advanced (blank) of all invertebrates

Answer 31

Nervous system

Question 32

Describe an open circulatory system

Answer 32

Fluid isn't completely contained in the vessels

Question 33

Describe a closed circulatory system

Answer 33

A heart circulates blood through a network of vessels that form a closed loop

Question 34

Mantle

Answer 34

A layer of tissue that covers the visceral mass

Question 35

Shell

Answer 35

Protects some mollusks from predators

Question 36

Foot

Answer 36

Helps the animal move

Question 37

Visceral mass

Answer 37

Gills, guts, and other organs

Question 38

Annelid worms are often called what?

Answer 38

Segmented worms

Question 39

What are 2 ways that annelid worms are more complex than the other worms?

Answer 39

Closed circulatory system | Complex nervous system

Question 40

How do earth worms help gardeners?

Answer 40

They eat dead plant and animal matter | They eat material in the soil