Why is active transport used to load organic compounds into phloem sieve tubes at the source?

How does the incompressibility of water allow transport along hydrostatic pressure gradients?

How do plants transport organic compounds from sources to sinks?

How can models serve as representations of real-world mechanisms in water transport through the xylem?

How would you design an experiment to test the effects of temperature or humidity on transpiration rates?

How can transpiration rates be measured using a potometer?

How can you draw the structure of primary xylem vessels in stem sections based on microscope images?

How can models like blotting paper, porous pots, and capillary tubing simulate water transport in xylem?

What adaptations do plants in deserts and saline soils have for water conservation?

How does the active uptake of mineral ions in the roots cause the absorption of water by osmosis?