General Biology Test #1 Ecology

50 Questions | Total Attempts: 1516

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General Biology Test #1 Ecology

Multiple Choice choose the BEST answer


Questions and Answers
  • 1. 
    Study the Figure below and answer the question that follows.What term describes a level of organization that contains only one species
    • A. 

      Ecosystem

    • B. 

      Community

    • C. 

      Population

    • D. 

      Biome

    • E. 

      Organism

  • 2. 
    Which of the following is ordered correctly from largest to smallest
    • A. 

      Organism, population, community, ecosystem, biome

    • B. 

      Ecosystem, biome, community, population, organism

    • C. 

      Biome, ecosystem, community, population, organism

    • D. 

      Biome, ecosystem, population, community, organism

  • 3. 
    How do the activities of a keystone species affect the biodiversity of an ecosystem
    • A. 

      They increase biodiversity.

    • B. 

      They decrease biodiversity

    • C. 

      They have no effect on biodiversity.

    • D. 

      Biodiversity remains the same but the species change.

  • 4. 
    What term describes a consumer?
    • A. 

      Heterotroph

    • B. 

      Autotroph

    • C. 

      Producer

    • D. 

      Chemosynthetic

  • 5. 
    What kind of organism provides the basis for an ecosystem's energy
    • A. 

      Heterotroph

    • B. 

      Autotroph

    • C. 

      Consumer

    • D. 

      Scavenger

  • 6. 
    Study the Figure below and answer the question that follows. Where does most of the energy in an ecosystem originate?
    • A. 

      Organisms

    • B. 

      Soil

    • C. 

      Food

    • D. 

      Sunlight

    • E. 

      Chemicals

  • 7. 
    Which organism is not paired correctly with its feeding relationship?  
    • A. 

      Rabbit-carnivore

    • B. 

      Fungus-decomposer

    • C. 

      Human-omnivore

    • D. 

      Millipede-detritivore

  • 8. 
    What organism is in the second trophic level in the following food chain: producer-herbivore-omnivore-carnivore?
    • A. 

      Carnivore

    • B. 

      Herbivore

    • C. 

      Omnivore

    • D. 

      Producer

  • 9. 
    How does energy flow in a food chain?
    • A. 

      From the lowest trophic level to the highest

    • B. 

      From the highest trophic level to the lowest

    • C. 

      From the sun to the producer

    • D. 

      From the consumer to the producer

  • 10. 
    What happens to a food web's energy at each link?
    • A. 

      Some is stored within the organism; the rest is lost to the environment

    • B. 

      All is stored within the organism.

    • C. 

      All is dissipated into the environment

    • D. 

      Some is stored within the organism; the rest reverts back to the producer.

  • 11. 
    What occurs during the process of nitrogen fixation?
    • A. 

      Ammonium is converted to nitrate.

    • B. 

      Nitrogen gas is converted to ammonia

    • C. 

      Ammonia is converted to ammonium.

    • D. 

      Nitrates are converted to organic compounds.

  • 12. 
    How does oxygen enter the atmosphere in the oxygen cycle?
    • A. 

      Plants release oxygen to the atmosphere as a waste product of photosynthesis

    • B. 

      Animals release oxygen to the atmosphere as a waste product of photosynthesis.

    • C. 

      Oxygen enters the atmosphere as carbon dioxide from photosynthesis

    • D. 

      Plants release oxygen to the atmosphere as a waste product of cellular respiration.

  • 13. 
    Which of the following does not return carbon to the atmosphere?
    • A. 

      Decay of once-living things

    • B. 

      Burning of fossil fuels

    • C. 

      Formation of carbonate rocks

    • D. 

      As waste from cellular respiration

  • 14. 
    In the ecosystem shown in the picture, which of the following is an example of an abiotic factor?\
    • A. 

      Mushrooms

    • B. 

      Tree roots

    • C. 

      Sunlight

    • D. 

      Fish

  • 15. 
    Which of the following organisms in this food web is a tertiary consumer?  
    • A. 

      Deer

    • B. 

      Snake

    • C. 

      Rosebush

    • D. 

      Wolf

  • 16. 
    What effect might the removal of an estuary have on the surrounding environment?
    • A. 

      Coastal areas would likely be more vulnerable to flooding

    • B. 

      Biodiversity in the area would increase

    • C. 

      The amount of nutrients in coastal waters would increase.

    • D. 

      The removal of an estuary would have no effect on the surrounding environment.

  • 17. 
    Which of the following is thought to contribute to global warming?
    • A. 

      Increased levels of greenhouse gases emitted from human sources

    • B. 

      Increased water vapor in the atmosphere

    • C. 

      Decreased amounts of carbon dioxide in the atmosphere

    • D. 

      Heat reflected from solar panels

  • 18. 
    Which of the following is an example of parasitism?
    • A. 

      Bees gathering nectar from a patch of flowers

    • B. 

      A barnacle living on the underside of a whale

    • C. 

      A brown-headed cowbird laying its egg in a vireo's nest

    • D. 

      A flea feeding on the blood of a dog

  • 19. 
    Which type of population growth is exhibited by the Daphnia population shown in the graph?
    • A. 

      Arithmetic growth

    • B. 

      Exponential growth

    • C. 

      Density-dependent grow

    • D. 

      Limited growth

  • 20. 
    Why do energy pyramids and biomass pyramids usually have a similar shape?
    • A. 

      An energy pyramid cannot contain more energy than organisms need

    • B. 

      As energy is lost, more biomass can be supported

    • C. 

      The amount of biomass on any level cannot be greater than the available energy can support

    • D. 

      Both energy and biomass are lost to the environment at equal rates

  • 21. 
    Why is so much energy lost from one trophic level to another?
    • A. 

      Organisms must use energy to warm their bodies

    • B. 

      Organisms stop growing as adults, so they don't need all the energy they take in.

    • C. 

      Cellular respiration is an efficient process

    • D. 

      The conversion of biomass from one organism to another is inefficient

  • 22. 
    If producers in a food chain take in 1000 kcal of energy, how much energy will likely be passed on to the second trophic level?
    • A. 

      More than 900 kcal

    • B. 

      About 100 kcal

    • C. 

      1000 kcal

    • D. 

      Less than 10 kcal

  • 23. 
    Which of the following is usually found in the smallest number in a pyramid of numbers?
    • A. 

      Producers

    • B. 

      Primary consumers

    • C. 

      Secondary consumers

    • D. 

      Tertiary consumers

  • 24. 
    Why don't most parasites kill their hosts immediately?
    • A. 

      The parasites would no longer have a food supply if the host died.

    • B. 

      The host is able to fight off the invading parasites.

    • C. 

      The host benefits by keeping the parasites alive.

    • D. 

      The parasites help the host before killing it.

  • 25. 
    A pack of wolves is fighting with a grizzly bear over a kill.  What kind of competition is this?
    • A. 

      Interspecific competition

    • B. 

      Intraspecific competition

    • C. 

      Predation

    • D. 

      Symbiotic competition

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