Across
- 2. are the basic units of structure and function in living things
- 6. the diffusion of water molecules across a selectively permeable membrane
- 7. an instrument that makes small objects appear larger
- 10. forms from many small molecules connected together
- 11. movement of materials across a membrane using cellular energy
- 15. a widely accepted explanation of the relationship between cells and living things
- 17. a genetic material that carries information about an organism and is passed from parent to offspring
- 18. some substances can cross the membrane while others cannot
- 21. is a group of similar cells that work together to perform a specific function
- 23. the process by which molecules move from an area of higher concentration an area of lower concentration
- 24. small grain-shaped organelles that produce proteins
- 25. a rigid layer that surrounded the cells of plants and some other organisms
- 26. cell membrane changes shape and engulfs the particle
- 28. controls which substances pass into and out of a cell
- 32. single-celled organisms
- 33. is a group of organs that work together to perform a major function
Down
- 1. covert energy stored in food to energy the cell can use to live and function
- 2. energy-rich organic compounds made of elements carbon, hydrogen, and oxygen
- 3. contain substances that break down large food particles into smaller ones
- 4. are compounds that are made mostly of carbon and hydrogen and some oxygen
- 5. fills the region between the cell membrane and the nucleus
- 7. which means “made of many cells”
- 8. receives proteins and other newly formed materials from, ER, packages them, and distributes them to other parts of the cell or to the outside of the cell
- 9. movement of dissolved materials across a cell membrane without using the cell’s energy
- 12. an substance that cannot be broken down simpler substances
- 13. very long organic molecules which consist of carbon, oxygen, hydrogen, nitrogen, and phosphorus
- 14. many tiny cell structures
- 15. form when two or more elements combine chemically
- 16. (ER) is an organelle with a network of membranes that produces many substances
- 19. captures energy from sunlight and changes it to a form of energy cells can use in making food
- 20. allows large particles to leave a cell
- 22. large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and , in some cases sulfur
- 27. group pf proteins that speed up chemical reactions in living things
- 29. made of different kinds of tissue that function together
- 30. acts as a cell’s control center, directing all of the cell’s activities
- 31. stores water, food, or other materials needed by the cell