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Across 2. Separate roles for each type of cell in multicellular organisms. 3. When the concentration of a solute is the same throughout a solution. 5. Group of organs that work together to perform a specific function. 7. Group of tissues that work together to perform a specific function. 9. Energy-requiring process that moves material across a cell membrane against a concentration difference. 11. Process in which extensions of cytoplasm surround and engulf large particles and take them into the cell. 14. Process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated . 15. Collection of living matter enclosed by a barrier; basic unit of all forms of life. 16. Diffusion of water through a selectively permeable membrane. 17. The mass of solute in a given volume of solution, or mass/volume. 18. When the concentration of two solutions is the same. 19. When comparing two solutions, the solution with the lesser concentration of solutes. 20. Process by which a cell releases large amounts of material.

Down 1. Movement of specific molecules across cell membranes through protein channels. 4. Process by which a cell takes in liquid from the surrounding environment. 6. Process by which a cell takes material into the cell by infolding of the cell membrane. 8. Specialized structure that performs important cellular functions within a eukaryotic cell. 10. When comparing two solutions, the solution with the greater concentration of solutes. 12. Idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells. 13. Group of similar cells that perform a particular function.