Across
- 5. Not studded with ribosomes
- 7. The thick fluid inside cells that contains the organelles
- 8. An organism consisting of only one cell.
- 9. A spherical structure within a eukaryotic cell’s nucleus where ribosomes are manufactured.
- 10. A cellular organelle found in plant cells that contains the pigment chlorophyll and is the site where photosynthesis takes place.
- 13. A type of passive transport in which substances can move across a cell membrane through special protein channels embedded in the membrane.
- 17. The cellular organelle that directs the protein building process.
- 18. The diffusion of water molecules through a semipermeable membrane.
- 20. The internal balance within the systems of living organisms that must be kept stable in order to maintain life.
- 22. individual organisms of the same species living closely together
- 24. he cellular organelle in which aerobic respiration takes place to release energy from food.
- 27. The non membranerbound region in prokaryotic cells that contains most of the genetic material.
- 28. The pressure exerted by water in a full central vacuole upon the cytoplasm and cell membrane of a plant cell
- 30. A structure made of two or more tissues that work together to perform a particular function.
- 34. A cellular signaling mechanism in which the product of a particular process inhibits the process itself.
- 36. Describes cells lacking a true nucleus and membranetbound organelles.
- 39. A group of cells that are specialized to perform a particular function
- 40. A whiptlike cellular organelle similar in structure to a cilium but longer and used primarily for movement in many bacteria.
- 41. An organism consisting of two or more cells and whose cells may not live independently apart from the organism.
- 42. A protective coating found outside the cell walls of many bacteria.
- 43. Describes a solution whose solute concentration is greater than the solute concentration of the cytoplasm in a cell.
- 44. A nonpigmented cellular organelle found in plant cells whose functions include storing starches, lipids, and proteins.
Down
- 1. A rigid structure made by cells of plants, fungi, and most bacteria to surround the cell membrane.
- 2. An organelle in plant cells that holds materials and helps maintain the cell’s shape through turgor pressure.
- 3. A cellular signaling mechanism in which the product of a particular process enhances the process itself.
- 4. The structure within cells that helps define their shape, maintains internal organization, and aids in division and movement.
- 6. 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.
- 11. he 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.
- 12. A short, hair-like extension of a cell used either for movement or as a sensory organelle.
- 14. A cellular organelle that contains digestive enzymes.
- 15. The two layers of phospholipids that make up a cell membrane.
- 16. Structures found within the cytoplasm of cells that perform the various functions cells need to stay alive.
- 19. A thin layer of phospholipids and proteins that defines the boundary of a cell.
- 21. The movement of substances across a cell membrane without the need for energy.
- 23. A stack of disk shaped thylakoids within a chloroplast.
- 25. studded with ribosomes
- 26. The membranebound region of a eukaryotic cell that contains the genetic material
- 29. The genetic material of eukaryotic cells consisting of DNA and associated proteins.
- 31. A group of two or more organs that work together to perform a particular function.
- 32. Describes a solution whose solute concentration is less than the solute concentration of the cytoplasm in a cell.
- 33. The cellular organelle that processes and packages proteins in preparation for secreting them from a cell.
- 35. Describes cells having a true nucleus as well as membranetbound organelles.
- 37. Describes a solution whose solute concentration is equal to the solute concentration of the cytoplasm in a cell.
- 38. The attachment point of the two chromatids in a chromosome.