I.
Geological Time Scale
1. Use the diagram to answer the questions in the box.
Place answer here:
a. Describe the change in organism over time (simple or
complex?)
b. What is the earliest living organism (single cell or
eukaryote?)
c. Do humans come first or last in the time scale?
d. where is the oldest part of the time scale (top or
bottom?)
2. Describe the endosymbiotic theory and how do cells become more complex over time?
3. Does this occur in long or short period of time?
12A
Level 4
4. According to the information in the box, which of these best describes the
relationship between rhizobia and bean plants?
a) Parasitism
b) Opportunism
c) Commensalism
d) Mutualism
12A
5. A tick crawling up a dog can eventually lead to what kind of relationship?
a) commensalism
b) parasitism
c) neutralisim
d) mutualism
12A
6. Insecticides help humans compete with insects for a resource. Which resource
is most likely to be preserved for humans through the use of insecticides?
a) Sunlight
b) Water
c) Food
d) Air
7. According to the diagram above, where do fossil fuels ultimately receive their
energy from?
a) Plants
b) Herbivores
c) Carnivores
d) The sun
11C
8. In the diagram above, bacteria convert ammonium in the water into less
harmful substances that plants can use. Which of the following statements
accurately summarizes the role of the bacteria in the fish tank?
A. The bacteria are necessary to balance the fish tank.
B. Bacteria probably are doing this out in nature also.
C. The bacteria would rot the fish if it died.
D. The plant uses what the bacteria make.
12 c
9. In an experiment, chickens were fed grain that contained a chemical marker in
its proteins. The presence of the marker can be detected in organisms. Which of the
following is the most reasonable prediction from this experiment?
A.
B.
C.
D.
The marker will only be found in the grain.
Both chickens and wolves will have the marker.
Wolves will have the marker, but chickens will not.
The marker will only be found in the animal's waste.
12c
Figure 10
10. Figure 10 shows a food web arranged into trophic levels. How many energytransferring steps away from the sun is the deer?
A.
B.
C.
D.
One
Two
Three
Four
12c
11. Some organisms' position in the food chain can vary as their diet differs. For
example, when a bear eats a plant-eating rodent, the bear is functioning as a
secondary consumer. When a bear eats berries, the bear is functioning as a
________________________.
A.
B.
C.
D.
Detrivore
Tertiary consumer
Primary consumer
Decomposer
12D
12. If a population grows larger than the carrying capacity of the environment, the
A.
B.
C.
D.
death rate will reach equilibrium.
birth rate will rise.
birth rate will not change
death rate may increase.
12 E
13.
A carrot plant is exposed to carbon dioxide containing
radioactive carbon for 24 hours. After this exposure, the carrot
roots are found to have accumulated radioactivity. These
carrots are then fed to a rabbit. One week later, the rabbit's
tissue is tested for radioactivity and is found to have a higher
than normal background count. Which biogeochemical cycle is
apparent from this study?
A.
B.
C.
D.
oxygen
carbon
water
nitrogen