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25 Cards in this Set
- Front
- Back
transpiration
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water loss thru leaves
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what environmental factors influence transpiration
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temperature: higher temp = higher transpiration
humidity: higher humid = lower transpiration air current= more wind, more transpiration |
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the transpiration rate will double for how many degree rise in temperature
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10 degrees
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why does transpiration increase when it is windy?
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wind will strip the boundary layer, which controls the amount of water loss
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how do plants CLOSE their stomatal openings?
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move potassium ions out of guard cell, and water follows it due to osmosis
-active transport (req. energy) |
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how do plants OPEN their stomatal openings?
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potassium ions move inside, water follows. causes stomates to open by turgor pressure
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phloem loading
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active process in which sugar is moved to the sieve tube of the phloem for transportation
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why is phloem loading an active process
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bc sugars are being moved from low concentration to high concentration
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what is phloem sap
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the product of the sugar produced and the water mixing in the sieve tube before being transported to the "sink"
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aphids
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small insectes who eat phloem sap
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water potential
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the energy present due to its position.
water will move from any area of high concentration to low concentration |
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diffusion
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random molecular movement into equal concentration
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osmosis
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movement of water from high concentration to low concentration through a membrane
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is osmosis a passive or active movement?
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passive
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bulk flow
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movement together in one direction due to pressure gradient
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absorption by roots
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water enters the root by osmosis
salt is higher in roots than soil so water will enter roots |
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cohesion tension theory
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water will bond to itself and other substances
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is water being pushed or pulled through the plant
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both
root pressure: push transpiration: pull |
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what is the driving force of water movement
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transpiration by leaves
as the plant transpires, it pulls more water up |
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do plants have determinate or indeterminate growth?
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indeterminate
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are plant organs determinate or indeterminate
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determinate
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propagation
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human intervention in cross a plant
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haploid
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getting the same amount of eggs from the father and mother
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diploid
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contain two sets of chromosomes
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annual
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goes from seed to producing seed in one year
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