BIO 170  - Second Exam  - 2021


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.  A fern would collect water mostly through its

                        a.  Gametophytes               b.  Roots                    c.  Sori

                        d. Rhizomes                e. Nonprofit “give water to the poor” foundation 



_______ 2.  The basic purpose of fruit:

                        a.  Feeding offspring                           b.  Feeding animals

                        c.  Spreading pollen                            d.  Spreading seeds

                        e.  Making us feel guilty for our dietary choices  



_______ 3.  The endosymbiont theory is about

                        a.  The evolution of land plants

                        b.  The contributions of the microbiome

                        c.  The origin of some eukaryote cell structures

                        d.  How some protozoan parasites evolved

                        e.  Some wacky biology idea that no one cares about 



_______ 4.  The counterforce to root pressure is

                        a.  Photosynthesis                   b.  Gravity                   c.  Suction

                        d.  Osmosis                              e.  Root medication

_______5.  In order for plants to adapt to land, they had to have

                        a.  Fungus symbionts                                      b.  Pollinators

                        c.  A new type of photosynthesis                    d.  Leaves

                                 e.  Signed the proper contracts

_______6.   Male pine cones tend to

                        a.  Appear earlier than female cones

                        b.  Appear later than female cones

                        c.  Appear higher on the tree than female cones

                        d.  Appear lower on the tree than female cones

                        e.  Unsure what joke here will not be problematical…



_______7.  An extremophile is mostly likely from which group?

                        a.  Yeasts                     b.  Archaea                  c.  Lichens

                        d.  Apicomplexa                      e.  Those Q-anon folks



_______8.   Sori are found in the

                        a.  Tracheophytes                            b.  Flagellates

                        c.  Bacteria                                      d.  Fungi

                                    e.  Rarer pasta category



_______9.  Two nutrients plants need, but are not the main input of photosynthesis:

                        a.  Nitrates & Phosphates                    b.   Water & phosphates

                        c.  Nitrate & carbon dioxide                d.   Water & carbon dioxide

                                                         e.  Pizza & beer



_______10.    Contractile vacuoles would be found in

                        a.  Land plants                         b.  Archaea                  c.   Algae

                        d.  Freshwater protozoans                   e.  Squeezy things 



_______11.  Which would be a bryophyte?

                        a.  Moss                       b.  Rose                       c.  Pine tree

                        d.  Fern                        e.  Eenyphyte, Meenyphyte, Mineyphyte… 



_______12.   The meristem is virtually the only part of the plant

                        a.  Growing                                         b.  Respiring

                        c.  Making new cells                           d.  Photosynthesizing

                                                e.  That everybody dislikes

_______13.  Reradiation can happen in materials when

                        a. Electrons jump outward                 b. Electrons jump back inward

                        c. They break down                            d.  They combine chemically

                                    e.  They don’t like the radiation they got for Christmas 



_______14.  A season with good growth will show up in a tree as

                        a.  A wide light ring                b.  A wide dark ring

                        c.  A narrow light ring             d.  A narrow dark ring

                                    e.  Some sort of ring, obviously 



_______15.   Which would be producing egg cells (ova)?

                        a.  Fruiting body                     b. Antheridia

                        c.  Stamen                               d.  Archegonia

                                    e.  Tiny chickens?


_______16.  Adhesion and cohesion are important factors in plants for

                        a.  Pollination                                      b.  Water movement      

                        c.  Germination                                   d.  Fruit formation

                        e.  Those plants, with their post-its and team-building exercises…




_______17.   Trypanosomes became medically important when what was explained?

                        a.   How they entered the brain

                        b.   How they prevented new infections

                        c.   How they evaded digestion

                        d.   How they remained for years in the blood

                        e.   How they came to have a long annoying name



_______18.  A “successful” disease organism usually must still get offspring to a new host


                        a.  The host’s immune response gets activated

                        b.  The host dies

                        c.  The organism uses up the resources it needs

                        d.  The first invasive organism dies

                        e.  It gets too fat and comfortable

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.  Why is it common for some commercial businesses to give antibiotic resistance alleles to  bacteria?




2a.  Main reason to open stomates:




2b.  Main reason to close stomates:

3.  Explain how auxins affect a germinating sprout.




4.  Briefly explain why alternations of generations has been particularly useful to-






5.  What is mostly transported in-





6.  What is the basic function of the -








7.  Fungi have been a good source of antibiotics.  Why exactly do they make them?




8.  What are the two major uses plants have for glucose?





9.  Cohn discovered why sterilization techniques don’t always work.  What was the reason?




10.   Below (deeper) the green algae, what are the next two algae types (in order)?





11.  Briefly explain how multiple fission works.




12.  What two pre-existing abilities were used to develop functional pollen?





13.  Why exactly is sectioning done to a specimen?




14.  Trees shift from mostly angiosperms to mostly gymnosperms with what two different changes in locations?





15.  Two different major scientific contributions from Lister (NOT Listerine!) -





16.  What are the two major different uses plants have for carotenoids?





17.  Briefly explain why many childhood diseases affect adults much worse than children.




18.  What are two different structures or materials that contribute to the “stiffness” of land plants?





19.  Which subgroups all use alternation of generations?






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.  What are the Koch Postulates for possible disease organisms?









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














3.  Give four sets of differences -


Plant Part





























4.  What are the four rules of the Cell Theory?









5.  At the points labeled with the stars, attach the appropriate labels from this list:  Violet.   X-Ray.  InfraRed.  Red.   Blue.   Ultraviolet.


          High Frequency \            Visible Range          /        Low Frequency


       *                       * /    *       *                    *       \   *





6.  Give three sets of differences between -



















7.  Other than the genders involved, give four sets of differences between -
















8.  Give three sets of differences that exist between the groups -














Link to Answer Key




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.

The math-based explanation for cell size limits has a major flaw.  What is it?  Three Points.



What makes pasteurized milk spoil?  Three Points.



Why are brightly-colored fish not brightly colored where they normally live?  Three Points.




What color flowers can a typical bee not pick out from the background?  Three Points.



What two types of organisms make up a lichen?  Four Points.



What’s wrong with the term spore?  Three Points.



A pine tree or a rose bush is considered a sporophyte.  Why does that seem wrong? (not connected to actual spores)  Three Points.



What can make auxins actively migrate?  Three Points.


A mushroom is a fungus, but it sort of isn’t.  Explain.  Three Points.




Briefly explain “sex as suicide” in some protozoans.  Three Points.


BIO 170

Michael McDarby