BI 173 - Third Exam 2007

BI 173 - Third Exam - 2007

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. Photosynthesis is commonly found in

a. Turbellaria b. Sponges c. Apicomplexans d. Flagellates e. The hardest questions

_______ 2. Most action-oriented hormones in vertebrate systems get released as a response to

                    a. Direct feedback to the particular gland                                 b. Tropic hormones
                    c. Nervous connections to the particular gland                          d. Releasing factors
                                                                        e. Peer pressure

_______ 3. It is found that a male cardinal will attack any of these: another cardinal, another red bird, a round red swinging pendulum;
it won't attack an accurately-painted model of a cardinal. This indicates that one possible sign stimulus is

a. An intruder bird b. A competing male c. Territory d. Motion e. Being punked by researchers

_______ 4. Symbiotic organisms are likely to perform a critical part in

a. Coordination of muscles b. Digestion of animal tissues c. Production of hormones
d. Digestion of plant tissues e. Helping figure out which tops go with which pants

_______5. Vitamins are defined as

                    a. Coenzymes that humans cannot synthesize                    b. Coenzymes that humans must synthesize
                    c. Enzymes that humans cannot synthesize                        d. Enzymes that humans must synthesize
                                                    e. Those chemicals invented by the Flintstones

_______6. Which is not a type of hormone action?

a. Metabolic b. Flight or fight c. Digestive d. Salivary e. The irritated punch to the face

_______7. Which are examples of particularly intelligent invertebrates?

a. Octopus & dolphin b. Bees & chimpanzee c. Squid & ants d. All of these
e. I see no signs of intelligence anywhere

_______8. People who have had Giardiasis (beaver fever) resist reinfection because

a. They have become immune b. The parasites prevent it c. The parasites leave the system
d. All of these e. It was just too much fun the first time - they couldn't stand that much fun again

_______9. Target cells are the "targets" of

a. Digestive enzymes b. Hormones c. Neurotransmitters d. Particular neuron types e. Bio-bullets

_______10. Proglottids should contain

a. Attachment structures b. Reproductive structures c. Radial symmetry
d. Cilia e. Some sort of warning stickers: Could make students' brains overload

_______11. Which go through alternation of generations?

                    a. Corals & malaria parasites                     b. Trematodes & sponges
                    c. Tapeworms & amebas                          d. Hydras & sponges
                                    e. The ones that can't make up their ganglia

_______12. Which are sessile?

a. Ciliates & flagellates b. Trematodes & cestodes c. Amebas & rotifers
d. Sponges & coral polyps e. You made that word up

_______13. Which study is in a "gray" zone where it might be ethology, but it might not?

                    a. Determining pain responses in dissected crickets
                    b. Studying grizzly bears by watching them through binoculars
                    c. Tracking coyote feeding patterns in suburban settings
                    d. Observing dolphin social interactions in Sea World enclosures
                    e. Watching lots of tv and sleeping, if I can get funding for it

_______14. When a ciliate with one micronucleus and one macronucleus needs to replace a worn-out macronucleus, it gets a new one by

                    a. Fixing the old macronucleus                                                b. Changing the micronucleus into a macronucleus
                    c. Copying the micronucleus and changing a copy                    d. Copying the macronucleus
                                                                    e. Going to Macromanager.com

_______15. Reaching the threshold point in a synapse depends upon

                    a. The connection of two insulation cells                    b. Where the neuron membranes meet
                    c. The sequence of gates opening                              d. Enough receptors picking up enough neurotransmitters
                                                e. There being something to hold some thres in

_______16. Which interact directly with receptors that are inside the cell?

a. Steroid hormones b. Neurotransmitter c. Digestive enzymes
d. Exocrine secretions e. Cellular sneaky stuff

_______17. Which group is almost exclusively found in fresh water?

a. Ciliates b. Sponges c. Rotifers d. Trematodes
e. The fresh water sea bass - no, wait a minute...

_______18. Of the Protozoa, Porifera, Cnidaria, and Platyhelminthes, which must be in a watery environment to be active?

a. All but Platyhelminthes b. Only Protozoa c. Only Porifera and Protozoa d. All of them
e. Isn't it embarrassing to wet the environment?

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. What are two characteristics shared by both Porifera and Cnidaria, which are not found in the "higher" animals?

2. Define: intermediate host.

3. What two adaptations found in animals serve to increase the velocity of nerve impulses?

4. What is usually the purpose of ritualized behavior?

5. Define: benthic.

6. Name or describe two different approaches used to increase surface for absorption of nutrients in digestive systems.

7. For each vision system, give one advantage it has over the other.
Compound Lens:	Single- Lens:

8. Define so that the differences between these behavior terms are clear:
ULTIMATE CAUSATION:	PROXIMATE CAUSATION:

9. What are the two major functions (not the parts, but what they do) of the vertebrate hindbrain?

10. Give examples of two different classes of warning displays.

11. In general, processing in vertebrate brains has evolved through which stages?
1	2	3

12. What are two good things that a tube digestive system can do but a sac digestive system can't?

13. Answer with some detail: what two critical items factor into a species evolving territoriality?

14. Give two sets of differences between Cnidarian -
POLYP FORM	MEDUSA FORM

15. Answer for nerve nets:
Feature that makes them different from other systems:	Characteristic feature of which Phylum?

16. For animals, a critically important evolutionary step shows up in the platyhelminths.
WHAT IS IT?	WHY IS IT SO IMPORTANT?

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. Briefly explain how input and output track through a typical nervous system, and include the general types of structures (including neuron types) involved.

2. For three basic regions of animal tube digestive systems, give the name of the region and then describe something that happens there that is not included in the basic name.

3. Give three different advantages for each. (Not looking for comparative sets here!)
SOCIAL BEHAVIOR	NONSOCIAL BEHAVIOR

4. What are six different types of environmental input that can be perceived with animal senses? (Different means that fairly different types of receptors are used)

5. Name three major parts of the vertebrate forebrain, and for each, briefly describe one thing that is processed there.

6. Name the three stages involved in a nerve impulse in an axon, and for each briefly explain what's happening in the cell.

7. For the three major subgroups of Platyhelminthes, give the group name and explain where one would most likely find specimens from that group.

8. Give three of the four major subgroups of protozoans, and for each give one characteristic found in that group that makes it distinct from the other groups.

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.

In humans, what's the primary purpose of saliva? Three Points.

Which metabolic waste is often mixed with feces before it leaves the body? Three Points.

Why might an animal eat dirt? Two Points Each.

How can we "afford" a blood-brain barrier? Three Points.

We actually have six legitimate, recognized senses. Which one is usually lumped in with one of the other five (Two Points), and why isn't it considered a separate sense (Two Points)?

Why would an animal exhibit a form of communication that it didn't have a sense to detect? Three Points.

Some animal features are not for survival, but to attract the attention of mates, kind of an advertisement that says, "you should make babies with me, because they'll be more likely to survive." Such features as moose antlers, peacock tails, and human breasts, even jewelry and a fancy car are of this type. What about such features makes it reasonable to think that the possessor actually is better able to get the essential resources of life? Three Points.

What odd ability do slime molds have? Three Points.

Briefly explain why ciliate sex could be considered a form of suicide. Three Points.

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