People have had great influence on the biological diversity

1.In terms of numbers of plants and animal species (biodiversity), the world's richest terrestrial ecosystems are the
tropical deserts.

  • tropical rain forests.
  • boreal forests.
  • temperate forests.
  • temperate grasslands.

2. The hydrologic cycle involves _____.

  • the movement of all gases
  • the cycling of ground water
  • the cycling of all water
  • the cycling of air masses
  • the cycling of nitrogen dioxide

3. All of the following are true about an ecosystem except

  • it is made up of living and nonliving environments.
  • it can only be located in the oceans.
  • it can be man controlled or natural.
  • it is a delicate balance between living and nonliving members.
  • it has energy and chemical materials flowing in cycles.

4. Photosynthesis is

  • a process through which green plants make their own food.
  • part of a hydrologic cycle.
  • a part of the water cycle.
  • the third stage of a food chain.
  • the process through which animals manufacture their food.

5.  The three major biotic components of an ecosystem structure are producers, herbivores, and carnivores.

  • producers, consumers, and decomposers.
  • plants, animals, and climate.
  • consumers, bacteria, and decomposers.
  • temperature, moisture, and light.

6.  An anthropogenic (human produced) process that returns carbon to the atmosphere is
wild fires.

  • volcanic action.
  • photosynthesis.
  • weathering of rock.
  • fossil fuel combustion.

7. Tropical forest destruction and degradation results from unsustainable, small-scale farming and cash crops farming.

  • cattle ranching and commercial logging.
  • mining operations and oil drilling.
  • economic growth and development.
  • All of the above

  Which of the following is NOT an important element in the structure of living organisms?

  • Carbon
  • Aluminum
  • Hydrogen
  • Nitrogen
  • Phosphorus

7.People have had great influence on the biological diversity in their surrounding environment as a result of hunting.

  • habitat destruction.
  • introduction of non-native species.
  • pollution of the environment.
  • All of the above

 8. Fossil fuels are formed by the compression of rocks.

  • the decay of dead organisms over millions of years.
  • volcanoes.
  • the decay of city sewage.
  • the decay of dead organisms over many decades.

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