Biology final project

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Across
  1. 3. Level The position an organism occupies in a food chain.
  2. 8. The non-living parts of an ecosystem, such as sunlight and water.
  3. 10. A close and long-term interaction between two different biological species.
  4. 12. Having two different alleles for a particular gene.
  5. 15. The physical appearance or observable traits of an organism.
  6. 18. The control center of a eukaryotic cell that contains genetic material.
  7. 21. A thread-like structure of nucleic acids and protein carrying genetic information.
  8. 23. A specialized subunit within a cell that has a specific function.
  9. 24. The primary energy carrier molecule used by cells.
  10. 28. A community of living organisms interacting with their non-living environment.
  11. 29. The process where organisms better adapted to their environment survive and reproduce.
  12. 31. The molecule that carries the genetic instructions for life.
  13. 32. The phenotype or genotype that is most common in a natural population.
  14. 34. An allele that masks the expression of a recessive allele.
  15. 35. The specific role or position an organism has within its habitat.
  16. 36. A protein that acts as a biological catalyst to speed up chemical reactions.
  17. 37. An organism that breaks down dead organic matter.
  18. 38. The change in the heritable characteristics of populations over generations.
  19. 39. The jelly-like substance that fills the cell and surrounds the organelles.
Down
  1. 1. A structure that has lost its original function through evolution.
  2. 2. The site of protein synthesis in the cell.
  3. 4. Having two identical alleles for a particular gene.
  4. 5. The science of naming, defining, and classifying groups of organisms.
  5. 6. An organism that must eat other organisms for energy.
  6. 7. The evolutionary history and relationship of a group of organisms.
  7. 9. The living components of an ecosystem.
  8. 11. The basic structural and functional unit of all living organisms.
  9. 12. Physical features shared by different species because of a common ancestor.
  10. 13. The tendency of a system to maintain a stable internal environment.
  11. 14. The genetic makeup of an organism, represented by letters.
  12. 16. An organism that produces its own food, usually through photosynthesis.
  13. 17. A trait that helps an organism survive and reproduce in its environment.
  14. 19. The organelle in plant cells where photosynthesis occurs.
  15. 20. The formation of new and distinct species in the course of evolution.
  16. 22. An allele that is only expressed when two copies are present.
  17. 25. Membrane: The semi-permeable boundary that regulates what enters and leaves the cell.
  18. 26. One of two or more alternative forms of a gene.
  19. 27. A specific segment of DNA that codes for a particular protein or trait.
  20. 30. The two-part naming system for species consisting of Genus and species.
  21. 33. The organelle responsible for producing energy (ATP) through cellular respiration.