SC 139 - Fourth Exam 1997

MULTIPLE CHOICE.

On the line to the left, place the letter of the choice that best answers the question.
Three Points Each. NOTE: "e" answers are never the correct answer.

1. Which of these is an incorrect statement?

_______       a. Spiders are carnivores in the Arthropods
                    b. Clams are filter-feeding Mollusks
                    c. Earthworms are scavengers in the Arthropods
                    d. Lancelets are filter-feeders in the Chordates
                    e. I'd love this class to just go on another month

2. A sting ray should have

_______       a. An exoskeleton             b. A ventral nerve cord            c. A bony endoskeleton
                    d. A dorsal nerve cord            e. A few residual checks from the Chevrolet people

3. The most obvious benefit an animal gets from a one-way, tube-in-a-tube digestive system, is that

_______       a. It's less crowded                                             b. Digestive enzymes can be used
                    c. Food can be broken down in many steps          d. More oxygen is absorbed
                                                        e. Less guts hanging out

4. Which types of animals go through metamorphosis, changing larval forms into physically very different adults?

_______       a. Snails and Snakes                          b. Sea urchins and Beetles
                    c. Birds and Roundworms                 d. Toads and Butterflies
                                e. The ones with very good plastic surgeons

5. In which group is every single species parasitic?

_______       a. Roundworms             b. Tapeworms             c. Arthropods
                    d. Segmented worms                 e. Do you feel a lawyer comment coming?

6. An important evolutionary development in land animals was

                    a. A nontoxic waste material                    b. Eggs with a jelly-like outer layer
_______       c. Cephalization                                      d. Movement with muscle power
                                                                e. Nikes

7. Which invertebrates are in the running for "most intelligent?"

_______       a. Ants & Octopi                               b. Humans and Apes
                    c. Snails and Planarians                     d. Squid and Roundworms
                        e. Y'know, invertebrate don't think it's cool to compete...

8. Which group has a body plan that keeps every cell fairly close to an outside surface?

_______       a. Mollusks             b. Roundworms            c. Segmented worms
                    d. Flatworms                    e. The Regis Philbin Fan Club

9. A spider would be most closely related to which of the following?

________       a. Centipede             b. Tick             c. Lobster            d. Cricket             e. Lawyer

10. The animal that causes swimmer's itch would have which feature as an adult?

_______       a. One-way digestive system                             b. Proglottids
                    c. It would be inside a bird                               d. Water vascular system
                                e. It would be embarrassed by things it did as a larva

11. Which is a segmented worm?

_______       a. Pinworm              b. Leech             c. Slug            d. Sea cucumber
                                    e. Is it this thing crawling up my leg -?

12. Generally, tapeworms are most dangerous, health-wise, when

_______       a. They are larvae             b. When they migrate            c. When they reproduce
                    d. They're never dangerous        e. Well, they're least dangerous when in somebody else

13. What makes a host an intermediate host?

_______       a. Parasite gets carried to next host there
                    b. Parasite reproduces asexually there
                    c. Parasite reproduces sexually there
                    d. Parasite does no damage there
                    e. They give the parties you go to to get invited to better parties

14. Which pairing would not be correct?

_______       a. Amphibians - sealed eggs                  b. Lamprey eel - bony jaws
                    c. Ray-finned fish - swim bladder         d. Reptiles - scaly skin
                                            e. My brain - this information

15. A bilaterally symmetrical animal from a pentaradial group with  bilateral embryos and ancestors:

_______       a. Sea anemone             b. Earthworm             c. Scorpion
                    d. Penguin                         e. Stop, I'm dizzy!

SHORT ANSWER.

Answer any eight of the following questions for 4 Points Each.
Note: if you answer more than eight, only the first eight will be corrected.
You can get partial credit on these answers.

1. What part of a typical Vertebrate's skeleton is sort of like an exoskeleton?

2. What major advantages came with the evolution of body cavities in animals?

3. What are two features that insects have as a whole group that sets them apart from other Arthropods?

4. Biologically, what is cleavage?

5. Hydras have a polyp form but no medusa. What's the most likely explanation for this adaptation?

6. What are two particular features that make mollusks different from most other animal groups?

7. Some larval parasites change the behavior of their intermediate hosts. Give an example of one such behavior change. You do not need to name the parasite, just the behavior change.

8. What are two of the major subgroups of Reptiles?

9. What sort of animal has proglottids, and what are they?

10. If an animal is free-living, what exactly does that mean?

11. What are the two subgroups of the Amphibians?

12. Give two sets of physical or functional differences between:

Centipedes	Millipedes

13. What are two common features of Arthropods that can be connected back to features in segmented worms?

5. What are three features found only in Chordates ( the whole group, both invertebrate and vertebrate Chordates)?

6. Pick four adaptations found particularly in Birds that help them fly, and for each, tell why that feature is useful for flying.

BONUS QUESTIONS.

Answer as many as you are able. Wrong answers will not result in points being lost from the main exam. You can get partial credit on these answers.

What sort of first aid involves urination on the wound? Three Points.

How has a system of satellites harmed small coral reefs? Three Points.

What supposedly advanced type of "thinking" did the flatworms show in Mr. McDarby's training experiment? Three Points.

A human schistosome outbreak decades ago in the U.S. disappeared after a few years. What's the most likely explanation? Three Points.

What basic body plans occur in at least 3 fairly-unrelated phyla? You just need to describe the plans, not name the phyla. Three Points Each.

Evidence has been found for 150-foot giant squid; however, one unknown makes the evidence uncertain. For Three Points, what's the problem?

What evolutionary development in sharks might make them resistant to cancer? Three Points.

Hagfish are also commonly called _____________________. Three Points.

Which groups of organisms are the most successful? For Three Points Each, name a group and present a short argument to support their being the most successful. Limit 5 Groups.