Across
- 3. The outermost, protective layer of cells covering the leaf, which contains the stomata and is often covered by a waxy cuticle.
- 8. Refers to the palisade mesophyll, a layer of tightly packed, column-shaped cells just below the upper epidermis that contains many chloroplasts for photosynthesis.
- 10. The state of stomata during the day (typically) when guard cells are turgid, allowing gases to diffuse for photosynthesis.
- 11. The main plant organ for photosynthesis, typically flat and thin to capture sunlight, with internal structures adapted for gas exchange.
- 12. The source of energy for photosynthesis, absorbed by chlorophyll in the chloroplasts.
- 13. The state of matter involved in exchange through stomata; carbon dioxide enters and oxygen and water vapour exit as gases.
- 15. The process of water vapour loss from the leaves of a plant, mainly through the stomata.
Down
- 1. The organelle within plant cells that contains chlorophyll and is the site where photosynthesis takes place.
- 2. The vascular bundle in a leaf containing xylem (to transport water and minerals) and phloem (to transport food/sugars).
- 4. The process by which plants use sunlight, carbon dioxide, and water to make their own food (glucose) and release oxygen; occurs mainly in the leaf.
- 5. Refers to the spongy mesophyll, a layer of loosely packed, irregularly shaped cells below the palisade layer, with air spaces for gas circulation.
- 6. The basic unit of life; leaves contain specialized cells like epidermal, guard, palisade, and spongy mesophyll cells.
- 7. Refers to the two specialized guard cells that surround each stoma and control its opening and closing by changing shape.
- 9. A tiny pore on the leaf epidermis, bordered by two guard cells, that allows gases (carbon dioxide and oxygen) to enter and exit.
- 14. Describes the cuticle, a waterproof, waxy coating on the leaf epidermis that reduces water loss and protects the leaf.