Ch. 32 hw

__________ describes the tendency of water molecules to stick to the fibers of plant cell walls.

Adhesion

In roots the _____ forces water and solutes to pass through the plasma membranes of _____ cells before entering the _____.

Casparian strip ... endodermis ... xylem

__________ describes the tendency of water molecules to stick to each other.

Cohesion

_____ cells are the cells that regulate the opening and closing of stomata, thus playing a role in regulating transpiration.

Guard

_____ bonds are responsible for the cohesion of water molecules.

Hydrogen

A developer decides to plant pine trees in a barren hill adjacent to his property. Unfortunately, the trees are not doing very well; in fact, many are starting to die, even though there are ample nutrients and water in the area. What is the likely culprit of the deaths in this tree plantation?

Mycorrhizal fungi are not present in the soil.

_____ provide(s) the major force for the movement of water and solutes from roots to leaves.

Transpiration

__________ describes the process by which water is lost from plants by evaporation.

Transpiration

Nitrogen-fixing bacteria in the soil __________.

convert atmospheric nitrogen to ammonia

The continuum of spaces between cell walls of neighboring cells is the __________ route of water and solute transport from root hairs to xylem.

extracellular

Which of these are symbiotic associations?

mycorrhizae

The channels indicated by the pointer, are _____.

plasmodesmata

When considering the source-to-sink model of phloem transport, what plant structures can act as either a source or a sink depending on the season?

roots

Guard cells actively open and close the stomata of leaves. What delicate internal balance do these guard cells control with their actions?

the balance between water uptake and gas exchange

When food is labeled 'organic' it means that _____.

the farmer grows food and processes it according to strict guidelines established and regulated by the USDA

An undergraduate student had a terrarium on her windowsill containing various houseplants. She wondered why the glass was often fogged with water droplets. A friend who had taken a biology class, tried to explain that it was because of _____.

transpiration

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

unable to control the amounts of water and solutes it absorbs