Topic 9 - Keystone Sample Quiz

10 Questions | By Fogellh | Updated: Mar 20, 2022 | Attempts: 802

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Ecology

Questions and Answers

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