BI 173 - Fourth Exam - 1999

MULTIPLE CHOICE.

 

Place the letter of the choice that best answers the question on the line to the left. Two Points Each.
NOTE: "e" answers are never the correct answer.


_______ 1. Which commonly have hydrostatic skeletons?
                    a. Diplopods & Trematodes             b. Nematodes & Annelids
                    c. Flatworms & Nematodes             d. Echinoderms & invertebrate Chordates
                                         e. The dullest of the dull groups


_______ 2. Which would probably produce uric acid?
                    a. Lizards & Crayfish                         b. Frogs & Starfish
                    c. Snails & Nematodes                      d. Ants & Robins
                            e. Depends on who's holding the patent


_______ 3. Most insects feed on
                    a. Other insects             b. Plants             c. Larger animals
                    d. Soil                                     e. Wednesday


_______ 4. Fleas are most closely related to
                    a. Ticks             b. Mites             c. Lice             d. Shrimp             e. Dogs


_______5. Sea squirts (tunicates) are most closely related to
                    a. Lizards             b. Snails             c. Hydra             d. Clams
                                                     e. Super Soakers


_______6. The subgroup with the most named vertebrate species:
                    a. Insects                         b. Amphibians                         c. Reptiles
                    d. Bony fish                                     e. The biggest one


_______7. Planktonic organisms would best be described as
                    a. Swimmers                     b. Floaters                     c. Crawlers
                    d. Marine                                 e. Made from boards


_______8. Which are bivalves?
                    a. Clam & oyster                                     b. Squid & octopus
                    c. Spider & scorpion                               d. Sea urchin & starfish
                                e. The new engine design in the Korean cars


_______9. Parapods would be supported by
                    a. Cartilage                             b. Bones                             c. Setae
                    d. Water vascular system                         e. Rich relatives


_______10. Which groups are mostly found in fresh water?
                    a. Cephalopods & Chilopods                     b. Trematodes & Nematodes
                    c. Echinoderms & Cartilage Fish                 d. Rotifers & Oligochaete worms
                                                         e. How fresh is fresh?


_______11. Subgroups of mollusks have their greatest differences based upon their
                    a. Mouthparts                     b. Nervous systems                     c. Foot
                    d. Skeletons                                         e. Political affiliations


_______12. Which are most likely to produce poisons used only for defense?
                    a. Echinoderms & arachnids                             b. Squids & tapeworms
                    c. Amphibians & millipedes                              d. Centipedes & nematodes
                    e. The local fast-food joint, to shut up customer complaints


_______13. Which type of animal would have a digestive cavity as its only internal cavity?
                     a. Nematode                     b. Trematode                     c. Slug
                    d. Leech                                 e. The one that never diets


_______14. Indirect muscle systems would be involved in
                    a. Squid "jet propulsion"                                 b. Butterfly flight
                    c. Sea urchin spine movement                         d. Shark swimming
                    e. One parent getting the other parent to whack the kid


_______15. An operculum is used to
                    a. Regulate buoyancy at varied depths
                    b. Provide additional protection to a single-lens eye
                    c. Cover gills
                    d. Remove wastes from an open circulatory system
                    e. Confuse unwary zoology students


_______16. A scolex is the
                    a. Anterior end of a cestode                     b. Excretory structure of an annelid
                    c. Larval form of a bee                             d. Wormstick / medical symbol
                                e. Wrong type of watch to buy from a street vendor


_______17. Metamorphosis occurs in a
                    a. Larva                     b. Nymph                     c. Pupa
                    d. Caste                                 e. Dark alley


_______18. The evolution of complex organs and organ systems can be tied most
                                closely to the evolution of
                    a. Bilateral symmetry                                     b. Circulatory systems
                    c. Body cavities                                             d. Mesoderm
                                         e. Better pencils to draw them with



SHORT ANSWER.  

Pick TEN Questions to answer in the spaces provided.
NOTE: if you answer MORE than ten, only the first ten will be corrected.
Four Points each. Partial credit is possible.


1. Name two phyla whose characteristics include closed circulation systems.





2. What are the two likely staging areas, where preadaptations for life on land evolved?





3. Briefly explain the significance of the trochophore larva.





4. Give the common names of the two subgroups of cartilaginous fishes.





5. What is the primary reason why platyhelminths are flat?





6. What is the biological significance of the onychophorans?





7. What are two phyla in which the outermost layer of the animals is characteristically a cuticle?




8. What are two characteristics shared by Echinoderms and Chordates, but found in virtually no other groups?




9. Chelicerates have three different types of appendages. What are two?





10. What, by definition, makes an organism an intermediate host?





11. Caenorhabditis elegans is a _________________(type of animal) used as a primary

research tool in _____________________(type of research).


12. What are two groups (phyla or major subgroup) that are technically segmented but which show very little segmentation in adult animals?





13. What makes an animal benthic?





14. What are (common names) the two major groups of amphibians?





15. An insect thorax commonly has how many of which locomotion structures?





16. a) A mantle is a group characteristic in which phylum? ________________________

b) Give one function of a mantle.




17. Name two structures found in lizards but not snakes.



 

LONG ANSWER.  

Select and answer completely any four of the following questions.
NOTE: if you answer more than four, only the first four will be corrected.
Six Points Each. Partial credit is possible.

1. For three types of parasitic nematodes, give:

NAME Site of Infection Unusual and/or unique fact




2. Name six major subgroups that are considered to be wholly terrestrial.


3. Echinoderms have many characteristics that are found in none of the other major animal phyla. What are six?







4. For each category, name three major subgroups of animals that virtually all are:
PARASITES PREDATORS



5. Name six of the subgroups (common names) included in the modern winged insects.


6. What are six unique characteristics of vertebrate chordates? (You can list general chordate characteristics that are unique.)







7. What are six particular challenges posed by life on land as it faced early tetrapods?







8. For three flight-related characteristics of birds, name the characteristic and the tell how it contributes to flight.







LINK TO ANSWER KEY

BONUS QUESTIONS.  

Answer as many or as few as you wish. You can't lose points on the rest of the exam by getting these wrong. Partial credit is possible.

Why has schistosomiasis become a bigger problem with Westernization in the tropics? Four Points.





Why is the medical symbol displayed with a snake instead of the worm it was originally used for? Four Points.




What positive effects might leeches have had when they were used for bloodletting centuries ago? (This is different from the modern medical use of leeches.) Four Points.





What circumstances would favor internal fertilization in an aquatic animal? Four Points.





Why do leaf-cutter ants cut leaves? Four Points.





Which animal changes its symmetry twice during its lifetime, and what are the three types of symmetry it goes through, in order? Eight Points.





There are many ways to define success. For Four Points each, up to four phyla, pick a phylum of animals and give a legitimate reason why it could be considered the most successful group of animals.

 

 

 

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