Vocabulary Topic 1 Lessons 1 - 3

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Across
  1. 4. - scientific study of how organisms are classified
  2. 6. - process of grouping things based on their similarities.
  3. 8. - a tiny, nonliving particle that enters and then reproduces inside a living cell
  4. 11. nomenclature - two part scientific name that indicates its genus and species
  5. 12. - single celled organisms that lack a nucleus.
  6. 13. - any change or signal in the environment that can make an organism react in some way
  7. 14. generation - mistaken idea that living things arise from nonliving sources
  8. 16. - eukaryotic organisms that cannot be classified as animal, plants, or fungi
  9. 17. - one cell carries out the function necessary to stay alive.
  10. 18. - an action or change in behavior due to a stimulus
  11. 19. - basic unit of structure for all living things
Down
  1. 1. - maintenance of stable internal conditions
  2. 2. - any living thing
  3. 3. - an organism that provides a source of energy or a suitable environment for a virus to live.
  4. 5. - organisms that benefit from living with, on, or in a host.
  5. 6. - feature or trait
  6. 7. - consisting of many cells that keep the organism alive
  7. 9. - broadest level of organization
  8. 10. - a group of similar, closely related organisms
  9. 15. - a group of similar organism that can mate and reproduce