ANIMAL STRUCTURE   

SPRING 2000

HOUR TEST II

BIOLOGY 226    

MEHAFFEY

 

      

 

 

1. (8 points) There are several characteristics that differentiate between protostomes and deuterostomes. Fill in the following table:

 

character
protostomes
deuterostomes

cleavage pattern

origin of coelom

origin of mouth

# coelomic cavities

 

2. (8 points) List the tagamata in the following arthropod groups:

 

            Myriapoda:

            Hexapoda:

            decapod Crustacea:

            Chelicerata:

 

3. (4 points) Malpighian tubules and nephridia are both concerned with nitrogen excretion, and each is found in arthropods. Malpighian tubules are more common in terrestrial arthropods. Why might this be?

 

 

 

 

 

 

 

 

4. (3 points) Differentiate between compound eyes and simple (ocellar) eyes.

 

 

 

 

 

 

 

5. (5 points) What are the five appendages of the head segments in a decapod crustacean?

 

 

 

 

 

 

 

6. (6 points) What are the three lophophorate phyla we covered? Give one (different) characteristic of each.

 

 

 

 

 

 

 

 

 

7. (4 points) What is the presumed function of the hemal system in echinoderms?

 

 

 

 

 

 

 

8. (3 points) How do starfish respire (exchange gasses)?

 

 

 

 

 

 

 

 

 

9. (4 points) What do coelomocytes do in echinoderms?

 

 

 

 

10. (22 points) Fill in the following table:

 

COMMON NAME
PHYLUM
CLASS

Portugese man-o-war

 

 

medicinal leech

 

 

sand dollar

 

 

scorpion

 

 

tapeworm

 

 

ant

 

 

chiton

 

 

sea cucumber

 

 

barnacle

 

 

squid

 

 

hookworm

 

 

 

11. (14 points) Fill in the following table:

 

Structure
Phylum
Function

madreporite

 

 

trophosome

 

 

chloragogen cells

 

 

radula

 

 

osphradium

 

 

typhlosole

 

 

tracheal system

 

 

 

 

 

 

 

 

 

12. (4 points) Why do some researchers consider Pogonophorans to be Annelids and others not?

 

 

 

 

 

 

 

13. ( 4 points) Why are Oligochaetes and Hirudinea grouped as “Clitellidae”?

 

 

 

 

 

 

 

 

14. ( 4 points)  Where would you look in a mollusc to find the coelom?

 

 

 

 

 

 

 

 

15. (4 points) What is “torsion” as applied to gastropods?

 

 

 

 

 

 

 

 

16. (3 points) What structure in the adult phoronid derives from the protocoel?

 

 

 

 

 

 

17. Five-point Bonus Question: List the main taxonomic divisions accepted by the International Committee on Zoological Nomenclature (ICZN).