1080 4

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Across
  1. 3. The collection of plants and animals in an environment
  2. 6. The act of a species completely disappearing
  3. 7. A sign
  4. 8. Animals that are warm blooded, hairy or furry and feed their offspring on milk
  5. 9. The family of animals including stoats, weasels, ferrets, badgers, mink and tree martins
  6. 10. Anything to do with the heart
Down
  1. 1. To completely remove
  2. 2. The breathing or gas exchange systems of animals and plants including how energy is extracted from food
  3. 4. A flavouring based on an asian spice
  4. 5. Getting fewer or less