Biology 11                   Review Test                                                   Name: ____________

Part 1:  Multiple Choice.  Write the letter of the correct answer in the blank at left.

1. ____ Which of the following organisms is most likely to be located at the top of the energy pyramid?
a) grass
b) grasshopper
c) snake
d) mouse
e) hawk

2. ____ In the nitrogen cycle, the transformation of gaseous nitrogen into nitrogen-containing compounds is performed primarily by
a) fungi
b) bacteria
c) green plants
d) herbivores
e) carnivores

3. ____ During the carbon cycle, which of the following carbon compounds would be utilized as an energy source by green plants?
a) calcium carbonate
b) carbonic acid
c) organic molecules
d) carbon dioxide
e) carbon monoxide

4. ____ Which of the following is true about secondary consumers in an ecosystem?
a) They eat only plants.
b) They are eaten by primary consumers.
c) They are smaller and weaker than are primary consumers.
d) They are fewer in number than are primary consumers.
e) They contain the greatest total biomass in the system.

5. ____ All of the following are density-dependent factors that limit animal populations EXCEPT
a) weather
b) predation
c) birthrate
d) food competition
e) mortality

6. ____ Some people have suggested that planting millions of trees will counteract the human addition of CO2 to the atmosphere.  In the long term, this idea could work only if:
a) biomass is produced.
b) photosynthesis occurs.
c) the trees never decompose or burn.
d) the trees are planted in the natural forest.
e) extra fertilizer is provided to the trees.

Part 2:  Graph.  Draw the graph and answer the questions.
The following data describes the growth of a bacterial colony over a period of time.

              Time(hours) Number of bacteria

                    0         0
                    1         4
                    2         6        a) Graph a representative diagram of this data.
                    3        16          (Label both axis on this graph)
                    4        32
                    5        64        b) The favourable survival temperature for this
                    6       128          particular species of bacteria is between
                    7       250          28?36 degrees Celsius. The favourable
                    8       256          reproducing temperature is between
                    9       252          32?34 degrees Celsius.
                   10       258         
                                       c)  Describe the growth of the bacterial colony
                   11       280           and the temperature conditions during each
                   12       420           of the following time periods:
                   13       600                     a) 17?20 hrs.
                   14       925                     b)  7?10 hrs.
                   15       945                     c)   0?2 hrs.
                   16       948                     d) 11?15 hrs.    
                   17       952
                   18       500
`	               19       100
                   20         0

Part 3:  Complete the following with the correct word or words.

1. An example of an abiotic factor would be		 ______________

2. Organism that feeds on dead tissues and waste.          ______________

3. Organism that feeds only on other organisms that produce their own food. __________

4. Organisms that make their own food.	 ______________

5. All the possible feeding relationships that exist within an ecosystem ______________

Part 4: Short Answer.  Respond to each of the following with complete sentences.

1.	a) What is meant by the term concept map?


    b) Draw and properly label a concept map to illustrate the interactions among
       organisms at  various levels from producer to third order consumer. 
       (Use the back of this paper.)

2.  a) Draw and properly label a concept map to illustrate the carbon cycle.


     b) Why is the carbon cycle important?

     c) If the carbon cycle is improperly balanced, what happens?

     d) How can this outcome be somewhat controlled?

3.  With the aid of a properly labelled diagram, describe the importance of the nitrogen cycle.
    (Use the back of this sheet.)

4..  a) How is a population of rabbits Adensity-dependent@?


     b)  List and describe four density-dependent factors.