Science and Nature

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Across
  1. 5. Essential gas for aerobic respiration.
  2. 8. Process of gradual development and change over time.
  3. 9. Transfer of pollen from male to female reproductive organs in plants.
  4. 10. Long-term alteration in Earth's climate patterns.
  5. 12. Cell division resulting in two identical daughter cells.
  6. 15. Unit of heredity that determines traits.
  7. 17. Essential element found in proteins and nucleic acids.
  8. 18. Biological community and its physical environment.
  9. 20. A massive system of stars, gas, and dust.
Down
  1. 1. Force that attracts two objects toward each other.
  2. 2. Element essential to life and found in organic compounds.
  3. 3. Subatomic particle with no electric charge.
  4. 4. Biological community and its physical environment.
  5. 6. Process in which two atomic nuclei combine to form a larger nucleus.
  6. 7. Preserved remains or traces of ancient organisms.
  7. 11. Study of celestial objects and phenomena.
  8. 13. Process by which green plants and some other organisms use sunlight to synthesize foods.
  9. 14. Capable of being decomposed by bacteria or other living organisms.
  10. 16. Genetic material carrying instructions for the development and functioning of living organisms.
  11. 19. Dense forest found near the equator, characterized by high rainfall and biodiversity.