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Across 3. hairlike projections used to help protozoans move 5. keeps the brown algae floating upright 10. stiff, but flexible covering to give the ciliates shape 12. close relationship between two species that benefits at least one of the species 13. any living thing 14. living parts of an environment 16. response to touch in plants 17. support the blades of the brown algae 22. dividing layers of a stem that produces new xylem and phloem 23. tiny, nonliving particle that invades and multiplies inside a host 24. virus that infects a bacteria 27. structures that eliminate excess water from the cell 29. has two nuclei, moves with cilia 30. struggle between organisms to survive as they attempt to use the same resources 31. outer layer of woody stems 36. asexual reproduction in bacteria 37. anchor brown algae to rocks 38. respons to light in plants 39. structure that contains a young plant in a protective covering 40. closely resembles plants, has green pigment 41. animal-like protists 44. branching, threadlike tubes that make up the bodies of fungi 48. plantlike protists 50. prokaryote with a cell wall and a flagella 51. sexual reproduction in bacteria 52. rootlike structure that anchors moss and absorbs water and nutrients 53. group of land ecosystems with similar climates and organisms 55. small, rounded, thick-walled resting cell in bacteria 56. evolutionary history of a species 57. molds and yeasts are examples of these 58. used to detect light 59. a tiny cell that is able to grow into a new organism

Down 1. plants that complete their life cycle in one growing season 2. the embryo begins to grow in this process 4. nonliving parts of an environment 6. organism that breaks down dead organism 7. living thing that provides a source of energy for a virus 8. heating food to a high temperature to kill harmful bacteria 9. grouping of objects or information based on similarities 11. broadest level of classification 15. temporary bulges in the cells of protozoans 18. study of how living things interact with each other and the environmetn 19. response to gravity of plants 20. two part naming system 21. branch of science that groups and names organisms based on different characteristics 25. long whiplike structure used for movement 26. series of predictable changes that occur in a community 28. seed leaves 32. movement of organisms from one place to another 33. behaviors and physical characteristics that allow an organism to live successfully in their environment 34. two or more atoms that act as a unit 35. a biological system of classification based on phylogeny 36. study of where an organism lives 42. role of an organism in its habitat or how it makes a living 43. older inactive xylem in stems 45. tiny structures that contain cells that will become sperm in plants 46. leaf of a fern 47. organisms that live in or on a host and harms it 49. type of root with many similar roots in a tangled mass 54. first part of the scientific name