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5 Written questions

5 Matching questions

  1. 5. How is the ecosystem level different from the other levels?
  2. 19. Name three types of symbiosis and explain how each organism is affected.
  3. 18. What is symbiosis?
  4. 8. What does population density measure?
  5. 11. How does natural selection determine the adaptations of organisms in an ecosystem?
  1. a The organisms with the traits best suited for the environment will have a greater survival rate and reproduce more that the ones without these traits
  2. b How many people live in one area
  3. c Commensalism- one is benefited one get nothing happened to it
    Parasitism- on is harmed and the parasite is benefited
    Mutualism- both organisms are benefited
  4. d The ecosystem is formed by the community and all the abiotic factors together
  5. e The way that animals inter act with each other and live together and at least one benefits

5 Multiple choice questions

  1. Forest fires
  2. 1. Abandoned field
    2. Tree growth begins
    3. Forest
    4. Climax community
  3. An organism role or job, determined by what an organism eats, how it eats, who it eats, how it reproduces, and physical conditions it requires to survive.
  4. Biotic- the parts of a habitat that are living, or were once living and interact with an organism
    Abiotic- the nonliving parts of an organism's habitat
  5. Biotic- plants, animals, paper
    Abiotic- sun, water, soil

5 True/False questions

  1. 9. What is a limiting factor? Give examples.-An environmental factor that causes a population to stop growing or to decrease in size
    -Natural disaster, space, food, water, weather conditions, population growth, disease


  2. 20. Give examples of each type of symbiosis.P- a tick on a dog
    C- a bird sitting on a deer
    M- a bee pollinating a flower


  3. 22. What are the two types of succession and how are they different?Organism-population-community-ecosystem


  4. 13. Why can two species not occupy the same niche?Because it would cause competition, because you can't share a job with something


  5. 14. What are two major interactions between organisms in an ecosystem?-Predation