Stomata

the process of transpiration is an active transport. Plants need to constantly keep pumping H+ ions from the stomata cells in order to keep the stomata open. If plant cells ran out of ATP (hypothetically) then all stomata would close and the water column would stop. Therefore, ...

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... C4 plants have Co2-fixing exzyme with higher affinity of Co2 than that of C3 plants, allowing them to photosynthesize efficiently with their stomata partly closed 4.Two microbes have been grown together in single agar plate.The first microbe has suppress the growth of the second microbe. ...

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... due to suction force which is due to transpiration. transpiration is an active process, because cells need to constantly pump ions (actively) into stomata guard cells to keep stomata open. Thus, if you really want to stretch the term, ascent of sap is active

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... wiki... Mass flow is caused by the decrease in hydrostatic (water) pressure in the upper parts of the plants due to the diffusion of water out of stomata into the atmosphere. Water is absorbed at the roots by osmosis, and any dissolved mineral nutrients travel with it through the xylem. could ...

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... Hints: If you had no transportation systems in stems, than how would the plant get all of its nutrients? Look up xylem and phloem. Look up stomata cells in leaves, they are the control centers of what is absorbed by the leaf tissue and what is expelled. Look up all the tissues in the leaf, ...

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