SC 139 - Third Exam 2002



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 fact is most responsible for getting water to  
                                    the leaves of trees?

_______             a. The leaves are photosynthesizing
                           b. Water is attracted to tube walls
                           c. Water moves into less dilute areas
                           d. Water molecules are attracted to each other
                           e. Super-Soakers in the roots


                        2. A leafís palisade layer would be made of

_______             a. Ground tissue                 b. Dermal tissue
                             c. Meristem Tissue             d. Vascular tissue
                             e. How come "green stuff" isnít one of the choices?


                        3. Which would not have true stems or leaves?

_______             a. Mosses or ferns                        b. Pines or maples
                           c. Mosses or liverworts                 d. Tulips or ferns
                                       e. You mean we canít trust plants?


                        4. What is the most critical feature that a flowers attracts pollinators with?

_______             a. Fruit                 b. Color                  c. Protection
                           d. Food                                     e. Infomercials


                        5. Mosses are often the first organisms to move into a newly-available ecosystem
                                 because they are

_______             a. Only sporophytes                 b. Nonvascular            c. Only gametophytes 
                           d. Pioneer organisms   
                     e. More likely to get a mortgage quickly


                        6. A pollen tube is used to

                           a. Attach pollen to pollinators                    b. Get sperm to egg cells
_______             c. Help a seed germinate                           d. Get pollen released into the wind
                                                                   e. Snort pollen


                        7. Which type of meristem growth is found in all modern plants?

_______             a. Apical                         b. Secondary                    c. Circular 
                           d. Reproductive   
                         e. Itís nice that the stems are happy...


                        8. Sex cells (gametes) are

_______             a. Haploid                 b. Always non-nucleated                 c. Always male
                           d. Diploid                         e. An advertising slogan misspelled


                        9. Which is a kind of ameba?

_______             a. Hydra                     b. Radiolarian                     c. Trichomonas
                           d. Moss                                     e. Conan OíBrien


                        10. A stamen produces

_______             a. Pollen                         b. Leaves                         c. Roots
                           d. Egg cells                                 e. Dog obedience


                        11. The main purpose of fruits is to

_______             a. Feed seeds                 b. Spread seeds                c. Feed pollinators 
                           d. Protect seeds   
                     e. Be made into sugary breakfast foods


                        12. Amebas are

_______             a. Excellent swimmers most of the time
                           b. Never harmful to humans
                           c. Always photosynthetic
                           d. More closely related to flagellates than to the other Protozoans
                           e. Just the cutest little things



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. Just on a tree, how can male cones usually be told from female cones?




2. What are two different uses for pseudopods?



3. Name two types of plant nutrients that are not directly used in photosynthesis.



4. What is the purpose of an endosperm?




5. What are four aspects of plants typically controlled through hormones?






6. What are the two main structures inside a seed?




7. What are the technical terms for the two parts of a leaf?




8. Briefly explain why pollen was such an evolutionary "breakthrough" for plants.




9. Ferns have a point in their life cycle that produces tiny plants...

What are


What is

their purpose?


10. Give two different structures on a plant that are connected with dermal tissue.



11. Give a brief example of how the physical structure of a flower can relate to its mode of pollination.



12. Trypanosomes keep from being attacked by the immune system by doing what?



13. What is usually the most reliable way to tell a true fern from another type of plant whose leaves happen to be fern-like? Include structure names.



14. Briefly explain how, in general, coevolution works.



15. Briefly explain how tree rings form.




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

1. Give three "matched" sets of differences between:










2. For types of asexual reproduction in plants, name three structures or techniques involved and then briefly describe them.








3. Give three general sets of differences between-

EGG CELLS (female)

SPERM (male)









4. For the concept of alternation of generations -

Give a


What alternates in

ferns? (give structures

AND basic function)

WHY do ferns need

to do this? Be fairly



5. Give three sets of differences between... (If structures are involved, name them!)












6. For the three roots growth zones of vascular plants, name the zones and then tell what sort of growth occurs in each.








Answer Key


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.

In terms of how they have adapted to life of land, ferns are most like which animal group (3 Points), and why? (Three Points)



How long does it usually take for fertilization in a typical conifer, after pollen reaches the female cone? Three Points.



When a seed sprouts, what aspect of the environment is used to cause the stem to grow upwards? Three Points.



You drive a nail into a young tree, about 3 feet from the ground and so about 2 inches of nail is sticking out. In 20 years, describe the approximate position that nail should be in. Four Points.



What product is made from mass flow material? Three Points.


Why can Mexican natives drink their water without getting the nasty effects we would get? Four Points.


If you have been diagnosed with Primary Amebic Meningoencephalitis, what should you do? Three Points.





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