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Ecology Unit Test Review

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  • Photosynthesis is important because...
    2. It makes food for the food webs
  • What is one human activity that negatively impacts sustainability? How?
    E.g., overfishing reduces the population of fish so drastically, many fish are not able to reproduce quickly enough to sustain its' populations
  • Oceans, rivers, lakes, and the moisture in the air are all part of which of Earth's spheres?
    Hydrosphere
  • What is a producer?
    A organism that uses sunlight to make its own food
  • What one similarity and one difference between commensalism and mutualism?
    At least one organism benefits in the relationship, however in commensalism the other organism remains unharmed; in mutualism, the other organism also benefits
  • What does not produce carbon dioxide?
    1. Photosynthesis
  • The arrows in a food chain or web represents what?
    3. They show what direction the energy is flowing between organisms.
  • Producers, consumers, decomposers. What are humans considered?
    Consumers
  • Which section of the pyramid has the most energy?
    1
  • What is biodiversity?
    The variety of life in the world or in a particular habitat or ecosystem.
  • Which organism(s) is (are) the predator(s) of the shrew?
    Snake
  • The original source of energy for a food web is...
    The sun
  • What is sustainability?
    The ability of an ecosystem to restore and maintain itself.
  • What risk levels go before (iess severe) and after (more severe) "threatened"?
    1. Special Concern 2. Endangered
  • Why is the nitrogen cycle important?
    It transforms unusable nitrogen gas (N2) into useable nitrate (NO3-).
  • According to this food web, how many consumers are herbivores?
    5
  • What is the purpose of cellular respiration?
    3. To release energy from food
  • Which section of the pyramid has the least amount of energy and would have the highest concentration of toxins?
    4
  • What is the difference between extirpated and extinct classification levels?
    Extirpated refers to populations no longer existing in a specific area, while extint refers to populations no longer existing anywhere on Earth.
  • C6H12O6 is also known as glucose (sugar). Where is it found?
    3. Both plants and animals
  • TRUE OR FALSE: All of the carbon in existence is continually recycled in the carbon cycle.
    True
  • The owl receives energy from which organisms?
    Mouse and Rabbit
  • This sphere is composed of all the living things.
    Biosphere
  • What is an invasive species?
    2. An organism that is new to an environment and has a negative effect on that environment.
  • Which animal is the top carnivore?
    hawk
  • An energy pyramid represents what?
    4. The amount of energy available to the next 'feeder' in a food web.
  • Why does the trend line plateau/flatten? What factors may cause this?
    Limiting factors prevent an organism's population to grow indefinitely. Some include: resource and habitat availability, disease, increased predation
  • What is ecology?
    The study of the relationships between living organisms, including humans, and their physical environment.
  • Which animal is in more than one trophic level?
    Titmouse
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