Term
| What is the name given to holes in the epidermis through which gas exchange takes place? |
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Definition
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Term
| Name the cells which open or close the stoma |
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Definition
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Term
| What is lost through the stomata? |
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Definition
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Term
| By which process does water enter root hairs? |
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Definition
| Osmosis (i.e diffusion of water) |
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Term
| By which process does water move from root hairs to the xylem. |
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Definition
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Term
| What force moves the water in the xylem vessels? |
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Definition
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Term
| How does water move from the xylem to cells in tissues? |
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Definition
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Term
| By what process does water moves out of cells in the air spaces between mesophyll cells? |
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Definition
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Term
| What process is responsible for the water vapour leaving the leaf through the stoma? |
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Definition
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Term
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Definition
| Transpiration is the loss of water through leaves. |
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Term
| Where are most stomata found? |
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Definition
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Term
| Which conditions result in greatest rates of transpiration? |
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Definition
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Term
| At night how do the leaf cells obtain their oxygen? |
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Definition
| Stomata are opened, oxygen diffuses from the air into the cells. |
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Term
| What are the names of the two transport systems in plants? |
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Definition
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Term
| What is transported by the xylem? |
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Definition
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Term
| What is transported by the phloem? |
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Definition
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Term
| Why is water required by plants? |
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Definition
| To transport substances and for photosynthesis |
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Term
| Characteristics of Xylem vessels? |
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Definition
Made of dead vessels
Contain lignin for support |
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Term
| Why are xylem vessels lignified? |
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Definition
| To withstand the pressure changes as water moves through the plant. |
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Term
| Characteristics of phloem vessels? |
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Definition
Made of living tissue
Made of sieve tubes and companion cells |
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Term
| What is the function of companion cells? |
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Definition
| Companion cells have a nucleus and carry all the functions needed to keep the nearby sieve vessels alive. |
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Term
| What needs to be continous between the phloem sieve tubes to ensure the transport of sugars? |
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Definition
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Term
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Definition
| Waxy cuticle - Prevents water loss |
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Term
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Definition
| Upper epidermis - Protective layer |
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Term
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Definition
| Palisade mesophyll - Where most of photosynthesis takes place. |
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Term
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Definition
| Spongy Mesophyll- For gas exchange - some photosynthesis too. |
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Term
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Definition
| Lower epidermis (Protective layer) |
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Term
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Definition
| Stoma (hole) and guard cells |
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