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Unit 1: MSLNG1 Stability and Change in an Ecosystem Pre-Test

Quiz by Carly Swain

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23 questions
Show answers
  • Q1
    1. What is the role of mountain lions in this ecosystem?
    d. carnivore
    b. omnivore
    c. producer
    a. herbivore
    30s
  • Q2
    2. What group of organisms are missing from this food web?
    d. herbivores
    a. producers
    b. decomposers
    c. carnivores
    30s
  • Q3
    3. Hunting has just started to be allowed in the ecosystem above, and humans are killing many of the deer. A reduction in the deer population will affect the amount of energy this ecosystem is able to provide for which of the following organisms?
    a. rabbit
    d. hawk
    b. mountain lion
    c. mouse
    30s
  • Q4
    4. Which of the following could possibly increase the total amount of energy the sparrow population receives within the food chain?
    a. an increase in the number of crickets
    d. a decrease in the number of hawks
    b. an increase in the number of rabbits
    c. a decrease in trees and grasses
    30s
  • Q5
    5. If additional sparrows were introduced into this ecosystem, there would most likely be an immediate decrease in the
    a. cricket population
    b. hawk population
    d. spider population
    c. frog population
    30s
  • Q6
    6. Which organisms in the food web are competing for the same resource?
    d. hawks and sparrows
    c. spiders, sparrows, and frogs
    b. mountain lions, snakes and hawks
    a. rabbits, crickets and spiders
    30s
  • Q7
    7. Which organism labeled in this food web provides energy, either directly or indirectly, to all of the other organisms?
    c. small plants
    d. cod
    a. elephant seals
    b. small animals
    30s
  • Q8
    8. What do the arrows in the diagram represent?
    b. life cycle stages
    a. flow of energy
    d. renewable resource depletion
    c. one community replacing another
    30s
  • Q9
    9. Which of the following correctly shows one path that energy would flow through this ecosystem?
    b. small plants 🡪 cod 🡪 krill 🡪 small animals
    a. killer whales 🡪 penguins 🡪 krill 🡪 small plants
    c. small animals 🡪 small plants 🡪 krill 🡪 penguins
    d. small plants 🡪 krill 🡪 squid 🡪 elephant seal
    30s
  • Q10
    10. Four levels of an energy pyramid are represented. Which statement about this energy pyramid is correct?
    c. Organisms from level 2 receive their energy from level 3.
    b. Organisms in level 2 are carnivores.
    d. Organisms in level 1 receive their energy directly from the sun.
    a. Organisms in level 4 receive their energy directly from the sun.
    30s
  • Q11
    11. Which level has the most energy available to it?
    c. 3
    a. 1
    d. 4
    b. 2
    30s
  • Q12
    12. Why are there usually just a few organisms at the top of an energy pyramid?
    b. So much energy is lost from one level to the next that the energy available can only support a few.
    a. Organisms at the top are larger and require more living space.
    d. Decomposers have a bigger impact on the highest energy level.
    c. Humans hunt organisms at this level.
    30s
  • Q13
    13. Lightning from a thunderstorm strikes a tree that falls to the forest floor and dies. During the next few years the dead tree undergoes many changes. What organisms are most likely responsible for the breakdown of the tree?
    b. plants
    a. animals
    c. fungi and bacteria
    d. scavengers
    30s
  • Q14
    14. Which graph shows what most likely would happen to the population of a certain animal if a new predator were introduced at time “A”?
    (3)
    (2)
    (1)
    (4)
    30s
  • Q15
    15. A rabbit population has increased noticeably in the past ten years. Which of the following is a reasonable hypothesis for this population growth?
    c. Abnormal weather conditions have decreased water levels of the local ponds.
    a. Competition for food has increased among rabbits.
    b. The rabbit’s main predator has been eliminated by human development.
    d. An organism that relies on similar food sources has migrated into the area.
    30s

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