Topic 9 - Keystone Sample Quiz
Ecology
- 1.Young birds that have been raised in isolation from members of their species build nests characteristic of their species. This suggests that the nest-building behavior is
- A.
Genetically inherited from parents
- B.
Learned by watching members of their species
- C.
A disadvantage to the survival of the species
- D.
A direct result of the type of food the bird eats
- 2.A volcanic eruption destroyed a forest, covering the soil with volcanic ash. For many years, only small plants could grow. Slowly, soil formed in which shrubs and trees could grow. These changes are an example of
- A.
Manipulation of genes
- B.
Evolution of a species
- C.
Ecological succession
- D.
Equilibrium
- 3.A major reason that humans can have such a significant impact on an ecological community is that humans
- A.
Can modify their environment through technology
- B.
Reproduce faster than most other species
- C.
Are able to increase the amount of finite resources available
- D.
Remove large amounts of carbon dioxide from the air
- 4.Abandoned railroad tracks are overgrown with weeds. Ten years later there are small aspen trees growing in the middle of the tracks. This change is an example of
- A.
Ecological succession
- B.
Biological evolution
- C.
Genetic variation
- D.
Heterotrophic nutrition
- 5.Why is a mushroom considered a heterotroph?
- A.
It manufactures its own food.
- B.
It divides by mitosis.
- C.
It transforms light energy into chemical energy.
- D.
It obtains nutrients from its environment.
- 6.Decomposers are necessary in an ecosystem because they
- A.
Produce food for plants by the process of photosynthesis
- B.
Provide energy for plants by the process of decay
- C.
Can rapidly reproduce and evolve
- D.
Make inorganic materials available to plants
- 7.An energy pyramid is shown below. Which graph best represents the relative energy content of the levels of this pyramid?
- A.
Graph 1
- B.
Graph 2
- C.
Graph 3
- D.
Graph 4
- 8.The graph below represents the amount of available energy at successive nutrition levels in a particular food web. The Xs in the diagram represent the amount of energy that was most likely
- A.
Changed into inorganic compounds
- B.
Changed into organic compounds
- C.
Recycled back to the producers
- D.
Lost as heat to the environment
- 9.The diagram below represents an energy pyramid constructed from data collected from an aquatic ecosystem. Which statement best describes this ecosystem?
- A.
The ecosystem is most likely unstable.
- B.
Long-term stability of this ecosystem will continue.
- C.
The herbivore populations will continue to increase in size for many years.
- D.
The producer organisms outnumber the consumer organisms.
- 10.Two food chains are represented below. Decomposers are important for supplying energy for
- A.
Food chain A, only
- B.
Food chain B, only
- C.
Both food chain A and food chain B
- D.
Neither food chain A nor food chain B
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