Lesson 2: Plant Structures and Their Functions

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Across
  1. 2. A woody, vascular seed plant whose seeds are not enclosed by an ovary or fruit.
  2. 4. A small hair or other outgrowth from the epidermis of a plant.
  3. 6. Long, thin xylem cells with perforated secondary cell walls for water conduction.
  4. 7. The outermost layer of cells covering the exterior of a plant.
  5. 9. A type of xylem cell that forms part of a continuous tube for water transport.
  6. 11. A phloem cell that helps move sugars into and out of sieve tube members.
  7. 15. A mode of reproduction by which offspring arise from a single organism.
  8. 19. Ground tissue that is between the vascular tissue and epidermis in a root or stem.
  9. 20. The specific job or task a part of an organism performs.
  10. 23. Loose tissue beneath the palisade layer of a leaf; has many air spaces.
  11. 27. An organ in vascular plants that anchors the plant and enables it to absorb water and minerals.
  12. 29. A living cell that conducts sugars in the phloem of angiosperms.
  13. 31. A chemical signal produced in one part of an organism that affects another part.
  14. 35. The outermost layer of the vascular cylinder of a root.
  15. 36. A group of tissues that work together to perform closely related functions.
  16. 37. One of the paired cells that control the opening and closing of a stoma.
  17. 38. An action or change in behavior that occurs as a result of a stimulus.
  18. 39. Layer of tall, column-shaped mesophyll cells just under the upper epidermis of a leaf.
  19. 40. Plant hormones that stimulate growth in the stem and leaves.
Down
  1. 1. A non-directional plant response to a stimulus.
  2. 3. The innermost layer of the cortex in plant roots.
  3. 5. The arrangement of parts in an organism.
  4. 8. Small openings on the underside of a leaf through which oxygen and carbon dioxide can move.
  5. 10. A gaseous plant hormone that stimulates fruits to ripen.
  6. 12. A group of similar cells that perform a specific function.
  7. 13. The long-term average weather conditions in a particular area.
  8. 14. The process by which plants use sunlight to synthesize foods from carbon dioxide and water.
  9. 16. A vascular plant organ consisting of an alternating system of nodes and internodes.
  10. 17. A structure that covers the tip of a root, protecting the root from injury.
  11. 18. To remain alive or in existence.
  12. 21. Vascular tissue that carries water upward from the roots to every part of a plant.
  13. 22. The evaporation of water from the leaves of a plant.
  14. 24. Vascular tissue responsible for the transport of nutrients and sugars.
  15. 25. The stalk that joins a leaf to a stem.
  16. 26. A change in an organism's surroundings that causes the organism to react.
  17. 28. A plant hormone that promotes cell elongation and root growth.
  18. 30. The basic structural and functional unit of all living organisms.
  19. 32. A multicellular eukaryote that produces its own food through photosynthesis.
  20. 33. A growth response of a plant toward or away from a stimulus.
  21. 34. Tissue that makes up the majority of a plant and provides support and storage.