Which of the following is an adaptation that enhances the uptake of water and minerals by roots?a. mycorrhizaeb. pumping through plasmodesmatac. active uptake by vessel elementsd. rhythmic contractions by cells in the root cortex

One of your friends has a terrarium on her windowsill containing various houseplants. She wonders why the glass is often fogged with water droplets. What would you tell her is the cause of the droplets?

Root pressure is attributable to __________.

Which of the following conditions will result in the fastest transport through the xylem in a tree, assuming adequate water supply in the roots?

What keeps the force of gravity from overcoming transpirational pull?

Fill in the blanks in this concept map to help you tie together key concepts concerning transport in plants.

Which structure or compartment is part of the symplast?a. the interior of a vessel elementb. the interior of a sieve tubec. the cell wall of a mesophyll celld. an extracellular air space

What important role does the Casparian strip play in the movement of water through plants?a. forces water to move through the cytoplasm of living endodermal cells as it makes its way from the soil to the xylemb. causes cells to shrink, thereby increasing pressure within cellsc. loads sugars into xylem, thereby causing water to enter the xylem by osmosisd. acts as a filter that prevents salts, heavy metals, and other pollutants from entering root hairs

Movement of phloem sap from a source to a sinka. occurs through the apoplast of sieve-tube elements.b. depends ultimately on the activity of proton pumps.c. depends on tension, or negative pressure potential.d. results mainly from diffusion.