BIO 170  - Third Exam  - 2019


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  The two major subgroups of arthropods are separated because of different                

                        a.  Mouthparts                                     b.  Living environments         

                        c.  Exoskeletons                                  d.  Numbers of legs    

                                    e.  Opinions on Facebook privacy issues 


_______ 2.  If you cut an Obelia medusa into quarter pie-slices, they would all be

equivalent, meaning the medusa has what sort of symmetry?

                        a.  Quadrilateral                      b. Bilateral                   c. Quadriradial

                        d.  Asymmetry            e. Isn't that some snake-head lady?

_______ 3.   Choanocytes are used for

                        a. Filter feeding          b.  Capturing prey                   c. DNA storage

                        d. Cell replacement                             e.  Formal dinner parties



_______ 4.  Neurotransmitters are primarily used

                        a.  In nerve-to-muscle communication

                        b.  In starting and sustaining a nerve impulse

                        c.  By receptors in converting environmental input

                        d.  When an impulse reaches a synapse

                        e.  When they finally plug phones directly into our brains


_______5.  A free-living species would most likely be found

                        a.  In a plant                                        b.  In an animal

                        c.  Out in the environment                  d.  In a place with no predators

                                                e.  In a drunken stupor


_______6.  Flowers can be found in

                        a.  Angiosperms only                                      b.  All vascular plants

                        b.  Angiosperms & gymnosperms                   d.  All land plants

                        e.  Most cases where feet have been inserted into mouths




_______7.   Cnidarian amebocytes’ main function is as

                        a.  Contractile centers             b.  Replacement cells              c.  Immune attackers

                        d.  All of these                         e.  Pairs of confusing words




_______8.  Tissue types whose distinction is mainly how the cells are set up (as opposed

                                    to something they can do) -

                        a.  Muscle and nervous                   b.  Nervous and connective

                        c.  Muscle and reproductive            d.  Connective and Epithelium

                                    e.  All I can think of is Kleenex



_______9.  Which would be echinoderms?

                        a.  Starfish & sponge                          b.  Hydra & coral
                        c.  Snail & oyster                                d.  Starfish & Sea urchin

                        e.  Couldn't we get by without the foreign languages?




_______10.    Metamerism is an evolutionary route to

                        a.  Bilateral symmetry                         b.  Increased size

                        c.  Better digestion                              d.  Improved respiration

                                    e.  Being the neatest of the neat



_______11.  The structure of a flower often can tell you the type of pollinator

                        it uses.  The relationship comes about through

                        a.  Germination                                               b.  Meristem growth

                        c.  Divergent evolution                                   d.  Coevolution

                                    e.  One of the weirder online dating sites



_______12.  Cnidarian polyps differ from medusae in that they

                        a.  Reproduce sexually and move      

                        b.  Reproduce asexually and move

                        c.  Reproduce sexually and don't move

                        d.  Reproduce asexually and don't move

                        e.  You mean being called different names doesn't count?



_______13.  A tick would be most closely related to

                        a.  Centipede               b.  Flea            c.  Earthworm

                        d.  Scorpion                        e.  Any government official



_______14.  In nematodes, the hydrostatic skeleton also acts as a kind of

                        a.  Digestive system                            b.  Protective covering    

                        c.  Circulation system                         d.  Sensory system

                                    e.  Thing a superhero might have




_______15.  On a conifer, female cones can be distinguished from male because they are

                        a.  Larger and higher                           b.  Smaller and higher

                        c.  Smaller and lower                          d.  Larger and lower

                                    e.  All girly.  Oops, I’m not allowed to say that, am I-?




_______16.  In most cases, the next step after a sperm gets through the membrane and other

                                    sperm are blocked, is

                        a.  Mitochondria are expelled                         b.  Extra sperm are expelled

                        c.  Meiosis of egg cell nucleus                        d.  Fusion of nuclei

                                    e.  The rest of the sperm get really depressed



_______17.  The organism that causes malaria is a(n)

                        a.  Apicomplexan                                b.  Flagellate

                        c.  Bacterium                                       d.  Fungus

                        e.  Nice, friendly, but misunderstood creature




_______18.  How and where spores get made distinguishes the subgroups of

                        a.  Apicomplexans                               b.  Gymnosperms

                        c.  Sponges                                          d.   Fungi

                        e.  Yeah, there are way too many places “spores” is used


Short Answer.    Pick NINE questions to answer in the spaces provided.

NOTE: if you answer MORE than nine, only the first nine will be corrected. 

Four Points each.   Partial credit is possible.


1.  What are two of the primary insect subgroups?






2.  Explain how a tree ring (a light ring and a dark ring) forms.




3.  What does each of these ciliate structures do?






4.  Which phylum has a water vascular system?



What is the purpose of that system?

5.  What are two different systems whose features tend to repeat in the segments of an annelid?





6.  Cephalization:  two questions...




What other

feature "goes"

with it?

7.  What does pentaradial symmetry mean?




8.  Environments where you'll find more gymnosperms than angiosperms -





9.   What does sessile mean?






10.  The abilities of early pollen probably derived from what two abilities that had "recently" evolved?






11.  What were two advantages connected with the evolution of a tube digestive system?





12.  What is meant by the term secondary sexual characteristics?




13.  What is the main purpose of a fruit?




14.  Of the four major protozoan groups, which two are generally linked in a supergroup?
Common names are okay.





15.  What is the purpose of a contractile vacuole?




What kind of ecosystem requires them?

16.  Why are flatworms flat?





17.  For two of the major mollusk subgroups, name the subgroup and describe the typical foot in that subgroup.






18.  What makes something an intermediate host?




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.

Seven Points Each.  Partial credit is possible.



1.  Give the hormones and steps involved during germination that assure that the parts of the plant grow where they’re supposed to.








2.  Give three sets of differences.  (Don’t use the same thing under different terms.)


















3.  For the three germ layers, name the layer and give two different systems derived from that layer -












4.  For three subtypes of muscle tissue, give the subtype and then one feature of the cells particular to that subtype.












5.  Give four sets of differences -


Plant Part































6.  Give three sets of differences between -




















7.  For the four fungi growth zones, give the name of each zone and what sort of growth goes on there.














8.  Under each of these types of skeleton systems, give two advantages that one has over the other.  Note, this is NOT asking for sets of differences!
















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.


What does gymnosperm mean?  Three Points.



How are yeasts not at all typical for their Kingdom?  Three Points.



Folks commonly exposed to Giardia will have one bout of beaver fever, but won’t suffer symptoms again.  Why not?  Three Points.



What very unusual thing results when two ciliates have sex?  Three Points.



When can regeneration effectively become reproduction?  Three Points.



What are the different ways that jellyfish stings can kill people?  Two Points Each.




Explain why it is thought that there are probably more nematode species than species in any other animal phylum.  Three Points.



The first major government expenditure for public health in the U.S. was intended to eliminate what organism?  Three Points.




What is the significance of the trochophore larva?  Three Points.




It's said that horseshoe crabs and open-water sharks have evolved not to evolve.  What specific ability gives them "nonevolution"?  Three Points.


BIO 170

Michael McDarby