Chapter 4 Vocab Crossword McGraw Hill

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Across
  1. 1. A result of natural selection when two similar species in a community occupy different ecological niches.
  2. 5. Genetic combinations best adapted for present environmental conditions tend to become predominant.
  3. 6. Species that require a narrow range of conditions or use very specific resources
  4. 9. Role and position of a species in an ecosystem .
  5. 13. The single environmental factor closest to tolerance limit for a given species at a given time.
  6. 14. A gradual change so that offspring are genetically distinct from their ancestors even though they live in the same place
  7. 16. When a predator dominates population dynamics
  8. 19. Chemical or physical factors that limit the existence, growth, abundance, or distribution of an organism.
  9. 20. Species that tell us something about the health or condition of a biological community
  10. 21. The intimate living together of members of two species
  11. 22. Symbiotic relationship benefiting one and not helping or harming the other species.
  12. 23. An organism which plays a critical ecological role.
  13. 24. Species that arise from a common ancestor through some barrier to reproduction
  14. 26. Geographic changes that isolate populations of species resulting in new species
Down
  1. 2. A species that is restricted to a single region, country, or other area.
  2. 3. Competition for resources among members of the same species
  3. 4. Varous populations sharing resources through specialization.
  4. 7. Process in which species exert selective pressure on each other.
  5. 8. symbiotic relationship that benefits both species.
  6. 10. Evolution of a new species
  7. 11. Evolution of two species to resemble or behave like each other.
  8. 12. Species that tolerate a wide range of conditions
  9. 15. Competition for resources between members of different species.
  10. 17. Physical changes that allow organisms to survive in a given environment
  11. 18. Relationship in which one organism feeds on another without immediately killing it.
  12. 21. Limited resources or adverse environmental conditions that favor certain adaptations in a population and may lead to evolution.
  13. 25. The place or set of environmental conditions in which an organism lives.