Across
- 3. An organism consisting of two or more cells and whose cells may not live independently apart from the organism.
- 6. Describes cells lacking a true nucleus and membranetbound organelles.
- 7. A thin layer of phospholipids and proteins that defines the boundary of a cell
- 11. The non membranerbound region in prokaryotic cells that contains most of the genetic material.
- 13. transports compounds around the cell and helps maintain the cell’s shape;
- 14. An organelle in plant cells that holds materials and helps maintain the cell’s shape through turgor pressure.
- 15. The cellular organelle that directs the proteinbuilding process.
- 17. A cellular signaling mechanism in which the product of a particular process enhances the process itself.
- 20. an organism that consists of a single cell
- 23. The thick fluid inside cells that contains the organelles. Also called the cytosol.
- 24. A short, hair-like extension of a cell used either for movement or as a sensory organelle
- 25. The cellular organelle that processes and packages proteins in preparation for secreting them from a cell.
- 26. The structure within cells that helps define their shape, maintains internal organization, and aids in division and movement.
- 27. a composed of two or more conspecific individuals living in close association with, or connected to, one another
- 28. A protective coating found outside the cell walls of many bacteria.
- 30. transports compounds around the cell and helps maintain the cell’s shape;
- 35. Describes a solution whose solute concentration is less than the solute concentration of
- 36. The movement of substances across a cell membrane without the need for energy.
- 39. The movement of substances across a cell membrane from regions of low concentration to regions of high concentration by any means that requires the use of energy.
- 41. Describes cells having a true nucleus as well as membrane bound organelles.
- 42. A group of two or more organs that work together to perform a particular function.
- 43. A cellular organelle that functions in the organization of microtubules.
- 44. A spherical structure within a eukaryotic cell’s nucleus where ribosomes are manufactured.
- 45. A group of cells that are specialized to perform a particular function.
Down
- 1. cytoplasm in a cell.
- 2. A cellular organelle that contains digestive enzymes.
- 4. The genetic material of eukaryotic cells consisting of DNA and associated proteins.
- 5. The cellular organelle in which aerobic respiration takes place to release energy from food
- 8. A stack of diskushaped thylakoids within a chloroplast.
- 9. A structure made of two or more tissues that work together to perform a particular function.
- 10. A rigid structure made by cells of plants, fungi, and most bacteria to surround the cell membrane.
- 12. A type of passive transport in which substances can move across a cell membrane through special protein channels embedded in the membrane.
- 16. Structures found within the cytoplasm of cells that perform the various functions cells need to stay alive.
- 18. A cellular organelle found in plant cells that contains the pigment chlorophyll and is the site where photosynthesis takes place.
- 19. A whiptlike cellular organelle similar in structure to a cilium but longer and used primarily for movement in many bacteria.
- 21. The membranebound region of a eukaryotic cell that contains the genetic material.
- 22. A cellular signaling mechanism in which the product of a particular process inhibits the process itself.
- 28. One of the fundamental models of biology that states that cells are the smallest form of life, come from preexisting cells, are the basic building block of all life forms,and carry out life processes to maintain homeostasis.
- 29. A nonpigmented cellular organelle found in plant cells whose functions include storing starches, lipids, and proteins.
- 31. The diffusion of water molecules through a semipermeable membrane.
- 32. Describes a solution whose solute concentration is greater than the solute concentration of the cytoplasm in a cell.
- 33. The two layers of phospholipids that make up a cell membrane.
- 34. studded with ribosomes and processes the proteins made by ribosomes
- 37. fats and breaks down toxic substances in liver cells
- 38. The internal balance within the systems of living organisms that must be kept stable in order to maintain life. Processes that maintain homeostasis include getting nutrition, expelling wastes, and responding to the environment
- 40. Describes a solution whose solute concentration is equal to the solute concentration of the cytoplasm in a cell.