Crossword Puzzle

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Across
  1. 3. Unit of heredity that is transferred from parent to offspring. (4 letters)
  2. 6. Symbiotic relationship where both species benefit.
  3. 7. Remains or traces of ancient organisms preserved in rock. (6 letters)
  4. 9. Supplying water to land or crops to help growth.
  5. 10. Animals hunted for food by other animals.
Down
  1. 1. A group of organisms capable of interbreeding and producing fertile offspring.
  2. 2. Chemical processes in living organisms that sustain life.
  3. 4. Natural environment where an organism lives. (7 letters)
  4. 5. A change in the DNA sequence that can lead to variation within a species. (8 letters)
  5. 8. Large geographical area characterized by its distinct climate and flora/fauna. (5 letters)