Science

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Across
  1. 2. This system includes the brain and spinal cord
  2. 5. This system breaks down food to give nutrients to our body
  3. 6. more than one cell
  4. 7. has a nucleus or organelles
  5. 9. has no nucleus or organelles
  6. 12. Succession Starts with very little biodiversity
Down
  1. 1. Species The first species to colonize or populate an area
  2. 3. has only one cell
  3. 4. This system delivers nutrients and oxygen to all cells in the body
  4. 8. Succession Starts with no existing soil or organisms
  5. 10. The role each organisms play in an ecosystem
  6. 11. This system is made up of skin, hair, and nails