Freshman Biology Wordsearch

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Across
  1. 3. The "cleanup crew" of an ecosystem, like fungi, that break down dead matter.
  2. 5. Movement of materials across the cell membrane without using any energy.
  3. 7. The jelly-like substance that fills the cell and holds organelles in place.
  4. 9. The physical trait you actually see, like blue eyes or curly hair.
  5. 11. The specific step or level an organism occupies in a food chain or pyramid.
  6. 14. A macromolecule used for long-term energy storage and making up cell membranes.
  7. 16. A special type of cell division that produces sperm and egg cells with half the DNA.
  8. 19. A win-win relationship where both species benefit from each other.
  9. 24. The gradual change in a population's traits over many generations.
  10. 25. When an organism has two different versions of a gene, one dominant and one recessive.
  11. 26. The actual genetic code or "letters" (like Bb) an organism carries.
  12. 27. The "brain" or control center of the cell that houses the genetic material.
  13. 32. Often called the "powerhouse," this organelle turns food into usable energy.
  14. 34. The "survival of the fittest" process where the best-adapted individuals pass on their genes.
  15. 36. A macromolecule built from amino acids that does most of the "heavy lifting" in cells.
  16. 37. The process of cell division that results in two identical "daughter" cells.
  17. 38. An organism that has to eat other living things to get its energy.
  18. 39. The non-living parts of an ecosystem, like sunlight, rocks, and water.
Down
  1. 1. A close, long-term relationship between two different species.
  2. 2. A special protein that acts as a catalyst to speed up chemical reactions.
  3. 4. The process plants use to turn carbon dioxide, water, and light into oxygen and sugar.
  4. 6. When a cell has to use energy (ATP) to move materials against the concentration gradient.
  5. 8. A simple, single-celled organism, like bacteria, that lacks a defined nucleus.
  6. 10. Having two of the same versions of a gene, whether both are "big" or both are "small."
  7. 12. Specifically refers to the movement of water across a semi-permeable membrane.
  8. 13. A specific trait, like a polar bear's white fur, that helps an organism survive its environment.
  9. 15. A complex cell, like those in your own body, that keeps its DNA tucked away in a nucleus.
  10. 17. The tiny "protein factories" that read instructions to build chains of amino acids.
  11. 18. A macromolecule used for quick energy, like the sugars found in fruit or bread.
  12. 19. A random "typo" or change in the DNA sequence.
  13. 20. All the living or once-living parts of an environment.
  14. 21. The specific role or "job" an organism has within its habitat.
  15. 22. When molecules spread out from a crowded area to a less crowded one.
  16. 23. The process by which cells break down glucose to release energy (ATP).
  17. 28. An organism, usually a plant, that makes its own food using energy from the sun.
  18. 29. A relationship where one organism thrives while the other is harmed.
  19. 30. The macromolecule family that includes DNA and RNA.
  20. 31. The body’s way of keeping things stable, like sweating to stay cool in the heat.
  21. 33. The green "solar panels" in plant cells that capture sunlight to make sugar.
  22. 35. One of the different forms or "flavors" of a specific gene.