biology

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Across
  1. 2. vascular tissue in plants
  2. 4. fluid transported by xylem
  3. 5. describes organism that does not move freely
  4. 7. symbiotic relationship between organisms
  5. 11. does not require oxygen
  6. 13. no backbone
  7. 15. perspective used to interpret the world
  8. 16. small opening on the underside of a leaf
  9. 17. requires oxygen
Down
  1. 1. internal balance with organisms
  2. 3. first phase of cellular respiration
  3. 6. mouthpart of insect
  4. 8. part of an ecosystem
  5. 9. grouping within a classification
  6. 10. has backbone
  7. 12. taxonomic division within a class
  8. 14. nonliving
  9. 18. the study of life