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leaf structure
cross section of leaf and epidermis (about stomata)
| Question | Answer |
|---|---|
| Vascular plants are a group of plants with vascular tissue or transport tissue..this tissue also gives structure and support to these plants. What are the two types of vascular tissue | Xylem and Phloem ( Xylem tissue is a major support structure) |
| What is transported by Xylem... describe | Xylem transports water from the roots to the leaves |
| What is transported by Phloem... describe | Phloem transports food ( sugars and other organic compounds) throughout the plant ..not just from roots ( from leaves and stems to roots and from roots to leaves and stems. REMEMBER FLOWUM.... FOOD...sounds very similar |
| What and where is the leaf's cuticle and what is it's function | it is a noncellular waxy layer on top of the epidermis layer. It helps prevent water loss ( slows evaporation) and helps prevent bacteria and other disease-causing organisms from entering a plant |
| Describe the epidermis of a leaf | there are two epidermal layers (an upper epidermis and a lower epidermis).. they typically don't have chloroplasts and don't do photosynthesis.. their function is mainly protection ( this layer also has the cuticle mentioned on another question |
| What is usually found on the lower epidermis (it can be on the upper epidermis but not typically) | stomata, stoma, or stomates ( all the same thing) |
| What are stomates ? | they are pores that serve as passageways for oxygen gas, carbon dioxide gas, and water vapor |
| What are guard cells? | they are paired cells on either side of the stomata , they contain chloroplasts and do photosynthesis in order to open or close the stomata |
| What leaf layer does the most photosynthesis... What leaf layer is also important for photosynthesis | the palisade does the major photosynthesis. The spongy layer is also important for this purpose.. ... they both have chloroplasts seen as small dots in the cross section of a leaf |
| What is another function of the spongy layer other than photosynthesis | It has loosely packed cells that allow the carbon dioxide , water vapor, and oxygen circulate freely |
| What term describes loss of water through the stomata ( water evaporating through the stomata) | transpiration |
| What gas or gases leave the stomata | oxygen and water vapor |
| What gas or gases enter the stomata | carbon dioxide |
Created by:
shemehl
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