Science

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Across
  1. 5. the practice of living as a parasite in or on another organism.
  2. 7. a biological community of interacting organisms and their physical environment.
  3. 8. physical rather than biological; not derived from living organisms.
  4. 11. an association between two organisms in which one benefits and the other derives neither benefit nor harm.
  5. 13. roughly calculate or judge the value, number, quantity, or extent of.
  6. 14. the action of coming to live permanently in a foreign country.
  7. 18. an animal that naturally preys on others.
  8. 19. the number or quantity of people or things that can be conveyed or held by a vehicle or container.
  9. 20. a close, prolonged association between two or more different biological species
  10. 25. the natural home or environment of an animal, plant, or other organism.
  11. 26. the ratio between the number of live-born births in the year and the average total population of that year
  12. 27. the process through which populations of living organisms adapt and change
  13. 28. an animal or plant on or in which a parasite or commensal organism lives.
  14. 29. the number of people per unit of area
Down
  1. 1. the action or process of adapting or being adapted.
  2. 2. a relationship in which both species are mutually benefited
  3. 3. the act of leaving one's own country to settle permanently in another; moving abroad.
  4. 4. all the inhabitants of a particular town, area, or country.
  5. 6. an animal that is caught and killed by another for food.
  6. 9. the ratio of deaths to the population of a particular area or during a particular period of time
  7. 10. a class of things of the same kind and with the same name
  8. 11. the activity or condition of competing.
  9. 12. anything that constrains a population's size and slows or stops it from growing
  10. 15. a group of people living in the same place or having a particular characteristic in common.
  11. 16. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
  12. 17. an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.
  13. 21. the preying of one animal on others.
  14. 22. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
  15. 23. a comfortable or suitable position in life or employment.
  16. 24. relating to or resulting from living things, especially in their ecological relations.