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Transport of Molecules in Plant

Transport of Molecules in Plant
Normally CO2 and O2 enter a plant by

osmosis
evaporation
active transport
diffusion

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Transport of Molecules in Plant
When guard cells swell

evaporation stops
stomata open
photosynthesis stops
stomata close

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Transport of Molecules in Plant
A widely accepted explanation for transport of sugar in phloem is called

pressure flow hypothesis
root pressure theory
cytoplasmic streaming
transpiration

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Transport of Molecules in Plant
The movement of most minerals, including potassium into root cells is by

bulk flow
active transport
diffusion
osmosis

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Transport of Molecules in Plant
Water moves into roots of plants by

diffusion
osmosis
active transport
pressure flow mechanism

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Transport of Molecules in Plant
Phloem is composed of

sieve-tube elements and companion cells
vessel elements and companion cells
tracheids and sieve-tube elements
tracheids and vessel elements

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