Term
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Definition
| increase the surface area for absorption |
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Term
| Adaptation of epidermal cells: |
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Definition
| bring minerals in through the soil by active transport |
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Term
| Root growth in length from? at? |
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Definition
| tip, at apical meristem (cells divide by mitosis) |
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Term
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Definition
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Term
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Definition
| heartwood, no longer functioning |
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Term
| guard cells are called.... |
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Definition
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Term
| what happens to guard cells as the sun rises? |
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Definition
| potassium ions are pumped into the guard cells |
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Term
| when H20 entesr guard cells, do they swell evenly or unevenly? |
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Definition
| unevenly. they become turgid. |
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Term
| do guard cells have chloroplasts? |
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Definition
| yes, they make PGALS and increase the solute conc. |
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Term
| stomata disapear during day or night? |
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Definition
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Term
| stomata disapear during day or night? |
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Definition
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Term
| when 2 inside surfaces of collenchyma meet, they are? |
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Definition
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Term
| what does the rate of transpiration depend on? |
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Definition
| the size of the H20 gradient |
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Term
| How does the temperature of the air affect the rate of transpiration? |
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Definition
| higher temperature, higher gradient, higher transpiration |
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Term
| how does humidity affect the rate of respiration? |
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Definition
| high humidity, less gradient, less transpiration |
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Term
| how does wind affect transpiration? |
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Definition
| more wind, more transpiration |
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Term
| What are the adaptations to reduce transpiration? |
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Definition
| thick cuticle, small thick leaves, and stomata in depressions |
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Term
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Definition
| tendency for H20 to come into the root, creating a force that push H20 up the xylem |
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Term
|
Definition
| water climbs up charged surfaces of xylem |
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Term
| Transpiration Pull/Cohesion Tension: |
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Definition
| losing H20 creates a pull in leaves due to transpiration |
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Term
| What are the requirements for Cohesion Tension? |
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Definition
1) continuous chain of water molecules
2)H20s must bond to each other (cohesion)
3) adhesion of water to sides of xylem |
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Term
| How can transpiration be good? |
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Definition
| prevents plant from overheating/evaporative cooling |
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Term
| What is the PROCESS called for moving organic molecules through the phloem? |
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Definition
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Term
| how do organic molecules move through phloem? (translocation) |
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Definition
| organic molecules move into the sieve cell, increases solute conc of sieve cell, water pushes molecules into next sieve cell |
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Term
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Definition
| plant's response to sun or light (leaves/stems) |
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Term
|
Definition
towards earth/ gravity
in roots! |
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Term
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Definition
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Term
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Definition
| plant's response to touch |
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Term
| How do hormones control a plant? |
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Definition
| by affecting cell division, elongation, and differentiation |
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Term
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Definition
| xylem, phloem, or diffuse from cell to cell |
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Term
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Definition
| produced in apical meristem, move by diffusion, cause greater elongation in stem cells |
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Term
| How do auxins cause for the phototropic response of plants? |
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Definition
| auxins move to shady side, where the cells elongate faster, causing plant to bend towards sun |
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Term
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Definition
| when the growth of buds are inhibited by auxins |
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Term
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Definition
made in root, travel through xylem
stimulate cell division, can overcome auxin influence of apical dominance |
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