bio

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Across
  1. 2. Whale with a 'unicorn horn' tusk
  2. 4. Where Darwin studied finches
  3. 6. Animal that has three hearts
  4. 7. This bird can fly backwards
  5. 8. This marine mammal can 'sing' for up to hours
  6. 12. Protein shell of a virus
  7. 14. The study of animal classification
  8. 15. Connects muscle to bone
Down
  1. 1. The pigment that gives plants their green colour
  2. 3. Marine creature that can survive being cut in half
  3. 5. Your body is made up of more of these than human cells
  4. 9. Bird with the largest wingspan
  5. 10. Largest organ in the human body
  6. 11. Uppermost layer of a rainforest
  7. 13. Only part of the body with no blood supply