Biology

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Across
  1. 1. Plant growth booster
  2. 5. Distinct group of living organisms
  3. 7. genetic transmission of characteristics
  4. 9. flexible skeletal tissue in sharks
  5. 11. primary energy source for plants
  6. 12. Appendages used for aquatic movement
  7. 13. Scientific study of microorganisms
Down
  1. 2. red blood cells carrying oxygen
  2. 3. Organ that produces digestive bile
  3. 4. hard protective layer of diatoms
  4. 6. Protective plates on fish skin
  5. 8. Cell group with shared function
  6. 10. Long digestive organ absorbing nutrients