Question

1. Which animal phyla are asymmetrical in their adult form? (3)

                                                                          

2. Which animal phyla are radially symmetrical in their adult form? (3)

                                                            

3. Which animal phyla are bilaterally symmetrical in their adult form? (3)

4. Which animal phyla have a complete (two opening) digestive system? (3)

5. Segmented worms belong to phylum

a. Nematoda

b. Mollusca

c. Porifera

d. Cnidaria

e. Platyhelminthes

f. Annelida

g. Arthropoda

h. Echinodermata

6. Segmented worms are

a. acoelomate

b. pseudocoelomate

c. coelomate

7. Segmented worms are

a. diploblastic

b. triploblastic

8. Segmented worms are

a. deuterostomes

b. protostomes

9. Segmented worms demonstrate the ____________________________________ level of organization

a. organ

b. tissue

c. cellular

10. What is cephalization? What does it have to do with bilateral symmetry? (4)

11. Earthworms belong to Class

a. Oligochaeta

b. Hirudinea

c. Polychaeta

12. Polychaetes are mostly found in ______________________________ environments.

a. marine

b. terrestrial

c. freshwater

13. Organisms in this class of annelids are often used to treat hematomas.

a. Oligochaeta

b. Hirudinea

c. Polychaeta

14. Each of the following organisms, except ________________________________________ belong to phylum Mollusca

a. crabs

b. oysters

c. snails

d. squid

15. These mollusks obtain their food via filter feeding

a. Class Gastropoda

b. Class Polyplacophora

c. Class Bivalvia

d. Class Cephalopoda

16. These mollusks are some of the most intelligent invertebrates on earth, exhibiting emotion and problem solving capabilities.

a. Class Gastropoda

b. Class Polyplacophora

c. Class Bivalvia

d. Class Cephalopoda

17. These mollusks use their radula to consume plant material

a. Class Gastropoda   

b. Class Polyplacophora         

c. Class Bivalvia           

d. Class Cephalopoda

18. All of the following are considered ancestral mollusk structures except

a. shell

b. foot

c. ink sac

d. mantle

19. Approximately __________% of all animals on earth belong to Phylum Arthropoda.

20. List two key characteristics that have allowed arthropods to become so successful. (2)

21. The dominant arthropods on land are

a. crustaceans

b. tapeworms

c. insects

d. spiders

e. sponges

22. The dominate arthropods in the ocean are

a. crustaceans

b. tapeworms

c. insects

d. spiders

e. sponges

23. What process do arthropods have to complete to grow larger? Why is this a disadvantage? (2)

24. You are observing an arthropod that has remained relatively unchanged for millions of years. This organism has blue blood (copper based) used in the medical industry. The organism belongs to Subphylum

a. Chelicerata

b. Myriapoda

c. Crustacea

d. Hexapoda

25. Coming into biology lab late one night in order to study for the upcoming lab final, you flip on the lights and notice hundreds of cockroaches scattering toward the walls. Regaining your composure, you become interested in these fascinating organisms and remember from BIOL 1002 that they belong to Subphylum

a. Chelicerata

b. Myriapoda

c. Crustacea

Answer 1

1) sponges phylum are asymmetrical in their adult. Asymmetrical means their body can' t be divided by any plane passing through its centre into two half .only sponges is the phylum that has no symmetry .
Example :- sponges

2) Echinodermata is the animal phylum that are radial symmetrical in their adult form . Radial symmetry is the symmetry that has more than one plane through which body is divided into 2 halves.
Example:- jelly fish

3) Annelida are the phylum that are bilateral symmetrical in their adult form . Bilateral symmetrical means their body can be divided into 2 halves only by one plane.

4) Nematoda or the Round worm are the organism that have the complete digestive system they have the mouth through which food enters into the body and another opening through which waste are excreted out .

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