Life Sciences 11 crossword

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Across
  1. 4. A community of interacting organisms and their environment
  2. 6. How plants produce energy
  3. 7. Form of asexual reproduction
  4. 9. A cell without a membrane bound nucleus
  5. 10. Study of classification
  6. 11. Development of a distinct "head" in organisms
  7. 13. An infectious agent that is not considered living or non-living
  8. 14. An organism with a single cell
Down
  1. 1. Organisms that do not require oxygen to live
  2. 2. Substance that creates immunity to a disease or pathogen
  3. 3. Error in DNA replication that results in a change in DNA sequence
  4. 5. Process by which organisms change over time
  5. 8. Most specific division of taxonomic rank
  6. 11. Phylogenetic tree
  7. 12. Self contained part of an organism with a specific function