Biology 2201: A Survey of the Invertebrate Animal Phyla Name: _____________________________

Instructions: Answer the following questions regarding invertebrates. You will find the answers in your notes and in the textbook on pages 182-189.

1.) What is the main difference between an invertebrate and a vertebrate?

2a.) The coelom is a body part found in many animals. What is another name for a coelom?

2b.) What is the benefit of having a coelom?

2c.) Name the three invertebrate phyla that lack a coelom.

2d.) Name the one invertebrate phylum that has a pseudocoelom. _____________________

3.) Briefly discuss the features that distinguish animals from plants.

Feature	Plants	Animals
Feeding Method
Cell Wall (Yes or No)

4a.) Name and define the two types of body symmetry in animals?

4b.) What appearance would a creature have if it is bilaterally symmetrical?

4c.) What appearance does a creature with radial symmetry have? __________________________________

4d.) What type of body symmetry is associated with the terms dorsal, ventral, anterior and posterior?_______

4e.) Draw a fish and label the body parts using the terms anterior, dorsal, ventral, and posterior.

5.) What are the three tissue / germ layers called?

6.) Name 1 invertebrate phylum with only two tissue / germ layers. _______________________

7a.) What body parts does each tissue/ germ layer form?

7 b.) Name the invertebrate phylum that has no tissue/germ layers. __________________________

7c.) Name the invertebrate phylum that has two germ layers. ______________________________

8.) What is an exoskeleton and which invertebrate phylum has one?

9.) What chemicals is an exoskeleton made up of? ______________________________________________

10.) Name the worm phylum that has external body segments. ____________________________

11.) Which invertebrate phylum is considered to be our closest relative? _____________________________

12.) What sex organs do hermaphrodites have that makes them special? _____________________________

13.) Why are sponges considered to be the simplest animals in terms of tissues and organs? ______________

14.) What does a closed circulatory system have that an open circulatory system does not? ______________

15.) Name two different examples creatures that are bivalves? _____________________________________

16.) Where are the sense organs located in a creature that shows cephalization? ______________________

17.) Which invertebrate phylum does each of the following belong to?

Creature	Phylum it belongs to	Creature	Phylum it belongs to
Starfish		Jellyfish
Sponge		Mussel
Octopus		Lobster
Earthworm		Planaria

18.) What type of protists are animals thought to have evolved from? _______________________________

19.) List four reasons why Arthropods are the most successful animal phylum? (See Textbook)

20.) List four reasons why insects are the most biologically successful class of organisms on the planet.

21.) What is the advantage of having both a mouth and an anus as opposed to only one digestive opening?

22.) Name 1 invertebrate phylum that has one single digestive opening. _________________________

23.) Name the phylum which the terms polyp and medusa are associated with._________________________

24.) Name the phylum which uses nematocysts for catching food. __________________________________

25.) What are the four features of all animals? _____________________ __________________________

_______________________________ ______________________________________________

26.) Which phylum has members which all have a muscular foot? ________________________________

27.) Which Phylum is being referred to below?

Common Name	Phylum	Common Name	Phylum
Flatworms		Segmented Worms
Round Worms		Sponges

28.) What feature allows one to identify a cephalopod from other mollusks? ________________________

29.) Which phylum’s latin name translates to mean “spiny skinned”? ______________________________

30.) Which phylum is described by the terms tube feet and water vascular system? ___________________

31.) Which Phylum includes creatures which have a muscular foot? _______________________________

32.) Although Arthropods are considered the most advanced Invertebrates they are not believed to be our

closest invertebrate ancestor. Why? Give two reasons.

33.) Describe the creature below:

Body Symmetry: _________________ GVC present or not? :_____________________

Coelom present or absent: _________________