34. Vascular Plant Transport

Stomata open during the day in response to __________.

What process contributes directly to the turgor pressure that opens and closes stomata?

The rate of transpiration is expected to be greatest on a __________ day.

What is the ultimate source of energy that moves water upward in the trunk of a tree?

During winter, tree sap can sometimes freeze, and cavitation (the formation of an air pocket) may occur. Which of the following mechanisms of sap transport would you expect to be most immediately affected by cavitation?

The last thing all water and solute molecules pass through before they enter the vascular system of roots and move upward to the leaves is __________.

A botanist discovered a mutant plant that is unable to produce the material that forms the Casparian strip. This plant is __________.

In a plant root, the one structure that water cannot move past via the apoplast is the __________.

Normally, when an aphid feeds by puncturing plant tissues, it does not have to suck the sap out. If an aphid, however, inserted its feeding tube in the wrong place, the fluid in the aphid's guts could be sucked out through the feeding tube. What could explain this phenomenon?

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?

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

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