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5 Written questions

5 Matching questions

  1. Trophic level
  2. Chemosynthesis
  3. Primary consumers
  4. Organisms
  5. Gross Primary Productivity (GPP)
  1. a An animal or plant with organs that function together to maintain life; a living thing; anything that resembles a living thing in structure or function
  2. b The rate at which an ecosystem's producers capture and store a given amount of chemical energy as biomass in a given length of time. Compare net primary productivity.
  3. c All organisms that are the same number of energy transfers away from the original source of energy (for example, sunlight) that enters an ecosystem. For example, all producers belong to the first trophic level, and all herbivores belong to the second trophic level in a food chain or a food web.
  4. d Organisms that are unable to produce their own energy. They must eat producers to obtain energy. Also called: consumers.
  5. e Process in which certain organisms (mostly specialized bacteria) extract inorganic compounds from their environment and convert them into organic nutrient compounds without the presence of sunlight. Compare photosynthesis.

5 Multiple choice questions

  1. Animals that feed on animal-eating animals. They feed at high trophic levels in food chains and webs. Examples are hawks, lions, bass, and sharks. Compare detritivore, primary consumer, secondary consumer.
  2. Cyclic movement of sulfur in different chemical forms from the environment to organisms and then back to the environment.
  3. The use of inorganic molecules other than oxygen to accept electrons at the "downhill" end of electron transport chains.
  4. All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment
  5. The process in which pyruvic acid is broken down and NADH is used to make a large amount of ATP; the part of respiration that is carried out in the presence of oxygen.

5 True/False questions

  1. CommunityAll the organisms that inhabit a particular area; an assemblage of populations of different species living close enough together for potential interaction.


  2. DecomposersOrganisms that break down the dead remains of other organisms.


  3. Nutrient (biogeochemical) cyclesThe pathways by which chemicals circulate through ecosystems that involve both living (biotic) and nonliving (geological) components.


  4. EcologyThe study of how living things interact with each other and their environment


  5. Nitrogen cycleCyclic movement of carbon in different chemical forms from the environment to organisms and then back to the environment.