biology crossword puzzle

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Across
  1. 4. branch of biology concerned with the relations between organisms and their environment
  2. 6. role of an organism within its environment and community (affecting its survival as a species)
  3. 9. subunit of chromatin fibers, consisting of DNA coiled around histones
  4. 13. living thing that has (or can develop) the ability to act or function independently
  5. 16. replication:method of DNA replication in which parental strands separate, act as templates, and produce molecules of DNA with one parental DNA strand and one new DNA strand
  6. 18. relation between two different kinds of organisms when one receives benefits from the other without damaging it
  7. 19. Species:Species that migrate into an ecosystem or are deliberately or accidentally introduced into an ecosystem by humans.
  8. 20. animal that feeds on flesh
  9. 21. animal that feeds chiefly on grass and other plants
  10. 22. that breaks down and obtains energy from dead organic matter
  11. 25. total mass of living matter in a given unit area
  12. 26. system formed by the interaction of a community of organisms with their physical environment
Down
  1. 1. specie :A species whose impact on its community or ecosystem are much larger and more influential than would be expected from mere abundance
  2. 2. type of environment in which an organism or group normally lives or occurs
  3. 3. group of interdependent organisms inhabiting the same region and interacting with each other
  4. 5. Respiration:The metabolic processes whereby certain organisms obtain energy from organic molecules
  5. 7. by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
  6. 8. :Symbiotic relationship in which both species benefit from the relationship
  7. 10. Species:Plants and animals that have migrated to places where they are not native
  8. 11. group of the same type of organisms living in the same place at the same time
  9. 12. organism that feeds on plant and animal remains and other dead matter
  10. 14. diversity of plant and animal life in a particular habitat (or in the world as a whole)
  11. 15. Species:Species that serve as early warnings that a community or ecosystem is being degraded.
  12. 17. struggle between organisms to survive in a habitat with limited resources
  13. 23. community:First integrated set of plants, animals, and decomposers found in an area undergoing primary ecological succession.
  14. 24. Species:Plants and animals that naturally inhabit an area
  15. 27. Community:A stable mature community that undergoes little or no change in species over time