science

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Across
  1. 3. - changes by organisms to better survive changes in an ecosystem
  2. 5. species - first organisms to colonize an area that was disturbed by disaster
  3. 6. environmental change - changes that occur quickly in an ecosystem and affect organisms immediately
  4. 7. reef - a human-made underwater structure built to promote marine life
  5. 9. - any substance used to fertilize the soil, especially a commercial or chemical manure
  6. 10. - a relation between organisms in which one lives as a parasite on another
Down
  1. 1. - a person or organism that provides resources for life, such as food, energy
  2. 2. - variation of life within an ecosystem
  3. 4. - the act or capacity of enduring
  4. 5. - microscopic marine algae; the base of several aquatic food webs
  5. 8. environmental change - changes that occur slowly over time and affects organisms over several generations
  6. 11. population - the population that occurs or comes later or after another