Biology Practice

Across

3. Variety of living organisms in an ecosystem.
6. Movement of particles from high concentration to low concentration.
7. Structure controlling what enters and leaves the cell.
12. Web Network of interconnected food chains.
13. Green pigment that captures sunlight for photosynthesis.
15. Storage organelle in a cell.
19. Reproduction Reproduction involving two parents.
20. Undifferentiated cell that can become specialized.
21. A change in a DNA sequence.
22. Organism that cannot make its own food.
25. Niche The role an organism plays in its environment.
26. Relationship where both organisms benefit.
28. Trait Trait hidden when a dominant trait is present.
30. Process where organisms best adapted survive and reproduce.
32. Square Diagram used to predict inheritance patterns.
36. Molecule involved in protein synthesis.
38. Basic unit of life.
40. Process of making RNA from DNA.
42. Respiration Cellular respiration that requires oxygen.
45. Specialized cell that carries nerve impulses.
46. Scientist known for the theory of natural selection.
47. Process plants use to convert sunlight into chemical energy.
51. Characteristic passed from parent to offspring.
52. Organism hunted by a predator.
55. Cell division producing identical body cells.
56. Organelle responsible for protein synthesis.
57. Molecule used by cells for energy.
58. Group of organisms able to reproduce fertile offspring.
62. Protein that speeds up chemical reactions.
63. Chemical messenger produced by glands.
66. A trait that helps an organism survive in its environment.
67. Process cells use to release energy without oxygen.
69. Movement of water across a semipermeable membrane.
70. Natural environment where an organism lives.
71. Organism that makes its own food.

Down

1. The largest population an environment can support.
2. Group of similar cells working together.
4. Threadlike structure carrying genetic information.
5. Graph Type of graph showing population growth over time.
8. Change in populations over generations.
9. Multiple populations living together in one area.
10. Respiration Cellular respiration that occurs without oxygen.
11. Segment of DNA controlling a trait.
13. Scientific theory stating all organisms are made of cells.
14. Observable traits or characteristics of an organism.
16. Different form of a gene.
17. Living factors in an environment.
18. Organism that obtains energy by eating other organisms.
23. Trait Trait that masks another trait when present.
24. Single-celled prokaryotic organisms.
27. Group of the same species living in one area.
29. Close relationship between two different species.
31. Process cells use to release energy from glucose.
32. Relationship where one organism benefits and the other is harmed.
33. Nonliving factors in an environment.
34. The genetic makeup of an organism.
35. Cell division producing reproductive cells.
37. Community of organisms interacting with their environment.
39. Maintaining stable internal conditions in an organism.
41. Process of copying DNA before cell division.
43. Scientist who first observed cork cells.
44. Organism that makes its own food from sunlight or chemicals.
48. Gas released during photosynthesis and used in cellular respiration.
49. Passing of traits from parents to offspring.
50. Nonliving particle that reproduces inside a host cell.
53. System Body system that fights disease.
54. Process where ribosomes build proteins.
59. Interaction where organisms fight for the same resources.
60. Molecule that stores genetic information.
61. Relationship where one organism benefits and the other is unaffected.
64. Organelle known as the “powerhouse of the cell.”
65. Organism that hunts other organisms for food.
68. Cell structure containing DNA and controlling activities.