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21 Cards in this Set
- Front
- Back
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What are the three types of root structures |
1. Tap root 2. fibrous 3. adventitious |
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What do root hairs do? |
Collect water and mineral nutrients, pull solution up to rest of plant. |
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Stomata |
On top allow plants to transpire |
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Guard Cells |
Flank the pore of stomata caises to open or close |
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Mesophyl |
vascular tissue contains lots of chloroplast |
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xylem |
vascular tissue pulls upward tissues and nutrients from the roots. |
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Pholeum |
Sugars and metabolic substances downwards |
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Cohesian Tension Hypothesis |
Evaporation from mesophyll cells produces a negetive water potential gradient that causes water and minerals to move upward through the zylem. |
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Why is there less water potential at the top of a tree? |
There is less water then there is at the roots. |
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Nitrogen fixation |
Chemical process by which atmospheric nitrogen is assiilated into organic compounds. as part of the nitrogen cycle. |
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Explain the relationship between nodules and legumas? |
Mutual relationship the bacteria Rhizobia form nodules on legumes the rhizobia create amonia from notrogen in the air which the plant uses. The bacteria gets sugars. |
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Epiphytes |
Grows on other plants for support but dosnt hurt them. |
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The Fluid Mosaic Model |
The fluid mosaic model explains various observations regarding the structure of functional cell membranes.
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Hypotonic |
Having a lower osmotic pressure that a particular fuid or intracellar fiod. |
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What is the water presssure formula. |
yw + yp= ypie (pretend that y is psi) |
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Water potential symbol |
Yw |
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Ys |
Solute potential |
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osmotic potential |
Ypie |
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how do you find the solute potential? |
y pie = ICRT I= ionization constant C: Osmolarity R: preassure constant 0.831 T+ temp 273+ C |
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active transport |
movement of molecules across cell memvrane assited by enzymes requireing energy. From areas of lower concentration to areas of higher concentation protein pumps. proteins ions large cells requires ATP energy |
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Passive transport |
does not require energy. from higher concetration to lower concentration nearly anything water soluable, |
