Water Movement in Plants Quiz

What is the primary pathway for water movement through the mesophyll in leaves?

• Symplast pathway

• Apoplast pathway

• Transmembrane pathway

• Vacuolar pathway

What structure allows water to move from cell cytoplasm to cell cytoplasm in the symplast pathway?

• Cell wall

• Plasmodesmata

• Xylem vessels

• Stomata

What is the main reason most water follows the apoplast pathway?

• It is faster

• It offers least resistance

• It is more energy-efficient

• It is more direct

What develops as water is drawn out of xylem vessels?

• Positive pressure

• Tension (negative pressure)

• Osmotic pressure

• Atmospheric pressure

What is established through the plant as a result of water being drawn out of xylem vessels?

• Temperature gradient

• Water potential gradient

• Nutrient gradient

• Light gradient

What theory describes the mechanism of water movement through the plant?

• Diffusion theory

• Osmosis theory

• Cohesion-tension theory

• Capillary action theory

What force helps maintain the water column in the xylem vessel?

• Gravitational force

• Cohesive forces between water molecules

• Centrifugal force

• Magnetic force

What prevents the water column from dropping down under gravity in the xylem vessels?

• Cohesive forces

• Adhesive forces between water and xylem vessel walls

• Capillary action

• Root pressure

The Casparian strip in the endodermis is a barrier to water made from...

• Cellulose

• Lignin

• Keratin

• Suberin

What is the role of cellulose fibrils in the apoplast pathway?

• They provide energy for water movement

• They act as a barrier to water movement

• They provide a pathway for water movement

• They store water