Science Crossword Puzzle

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Across
  1. 3. The study of hereditary and variation of characteristics
  2. 6. No membrane-bound organelles
  3. 9. Diagram showing the flow of energy, includes food chains
  4. 11. Father of genetics
  5. 15. Transition zones between different air masses
Down
  1. 1. A unit of hereditary transferred from parent to offspring
  2. 2. An event or force of nature that has catastrophic consequences
  3. 4. Body system that produces hormones that regulate bodily functions such as metabolism, energy levels, and stress
  4. 5. Destruction caused by sudden natural or man-made disasters
  5. 7. Specifies the position of an organism in the food web
  6. 8. Living factors of an ecosystem
  7. 10. Body system that maintains all fluids inside the body and acts as a defense against invasive illnesses
  8. 12. Contain membrane-bound organelles
  9. 13. Reproduction with one organism, produces a clone
  10. 14. Observable characteristics passed from parent to offspring