biology

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Across
  1. 4. A change in the DNA sequence that can lead to variations in traits.
  2. 6. Selection The process where organisms better adapted to their environment tend to survive and reproduce.
  3. 10. The variety of life in a particular habitat or ecosystem.
  4. 11. A cell structure that makes proteins.
  5. 12. The powerhouse of the cell, producing energy.
  6. 14. The movement of particles from an area of high concentration to low concentration.
  7. 19. A segment of DNA that codes for a protein or trait.
  8. 20. A community of living organisms and their environment.
  9. 21. A trait that helps an organism survive and reproduce in its environment.
  10. 25. The process by which plants make food using sunlight.
  11. 27. Deoxyribonucleic acid, the molecule that carries genetic information.
  12. 28. Fixation The process of converting nitrogen gas into ammonia, making it available to plants.
  13. 29. The basic unit of life.
  14. 30. A close relationship between two species that benefits at least one of the species.
Down
  1. 1. The control center of a cell containing DNA.
  2. 2. A relationship where both organisms benefit.
  3. 3. A relationship where one organism benefits and the other is neither helped nor harmed.
  4. 5. A relationship where one organism benefits at the expense of another.
  5. 7. A structure made of DNA that contains many genes.
  6. 8. The process by which organic substances are broken down into simpler organic matter.
  7. 9. A type of fat used for long-term energy storage and cell membranes.
  8. 13. The maintenance of a stable internal environment in an organism.
  9. 15. A protein that speeds up chemical reactions in the body.
  10. 16. Cycle The movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
  11. 17. A molecule made of amino acids that performs various functions in the body.
  12. 18. An interaction where one organism, the predator, feeds on another organism, the prey.
  13. 22. Acid A molecule that stores and transmits genetic information.
  14. 23. An organelle in plant cells where photosynthesis occurs.
  15. 24. A molecule made of sugars that provides energy.
  16. 26. The diffusion of water across a selectively permeable membrane.