Across
- 1. Network of protein filaments that gives a cell its shape and internal organization
- 3. Relatively constant internal physical and chemical conditions that organisms maintain
- 5. Signal to which an organism responds
- 6. Series of events in which a cell grows, prepares for division, and divides
- 8. Experiment in which only one variable is changed
- 10. In cells, structure that contains the cell’s genetic material in the form of DNA
- 11. Disorder in which some of the body’s cells lose the ability to control growth
- 13. Force of attraction between different kinds of molecules
- 17. Organelle that converts chemical energy stored in food into usable energy
- 19. Compound used by cells to store and release energy
- 20. Process of diffusion in which molecules pass through membrane channels
- 21. Developing stage of a multicellular organism
- 24. Scientific study of life
- 26. When the concentration of two solutions is the same
- 28. Basic unit of all forms of life
- 31. Light-independent reactions of photosynthesis that use ATP and NADPH to build high-energy compounds
- 34. Small chemical unit that makes up polymers
- 36. Compound made of carbon, hydrogen, and oxygen; major energy source
- 37. Phase of mitosis in which chromosomes line up across the center of the cell
- 39. Process of programmed cell death
- 41. Process used by plants and other autotrophs to capture light energy and convert carbon dioxide and water into energy-rich carbohydrates
- 42. Evidence or information gathered from observations
- 45. Macromolecule containing carbon, hydrogen, oxygen, and nitrogen needed for growth and repair
- 46. Fluid portion of the chloroplast outside of the thylakoid
- 47. External regulatory protein that stimulates the growth and division of cells
- 48. Subunit of nucleic acids made of a sugar, phosphate, and nitrogenous base
- 49. Process that requires oxygen to release energy
Down
- 2. Pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
- 4. Unspecialized cell that can give rise to one or more types of specialized cells
- 7. Organelle that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum
- 9. Group of tissues that work together to perform closely related functions
- 12. Group in an experiment exposed to the same conditions as the experimental group except for the independent variable
- 14. Possible explanation for observations; educated guess
- 15. Compound with an amino group on one end and a carboxyl group on the other
- 16. To change over time
- 18. When comparing two solutions, the solution with the lesser concentration of solutes
- 22. A personal preference or point of view rather than scientific objectivity
- 23. Process of reproduction involving a single parent producing genetically identical offspring
- 25. Series of electron carrier proteins that shuttle high-energy electrons during ATP-generating reactions
- 27. Organelle that captures energy from sunlight and converts it into chemical energy
- 29. Diffusion of water through a selectively permeable membrane
- 30. Unicellular organism that lacks a nucleus
- 32. Amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius
- 33. Part of eukaryotic cell division during which the cell nucleus divides
- 35. On or in a cell, a specific protein that binds a molecular messenger such as a hormone
- 38. Substance that is dissolved
- 40. Molecules composed of many monomers
- 43. Genetic material organisms inherit from their parents
- 44. Process by which cells release energy in the absence of oxygen