The movement of minerals through the apoplast is interrupted at the:
Epidermis
Cortex
Casparian strip
Phloem
Related Questions
A plant is exposed to a chemical that specifically inhibits the activity of aquaporins in root cells. Which of the following would be the MOST direct consequence of this inhibition?
Increased rate of transpiration
Enhanced mineral absorption
Stimulation of phloem loading
Reduced water uptake by the roots
Which of the following is NOT a characteristic of the apoplastic pathway?
Movement through cell walls
Movement through intercellular spaces
Unregulated movement until the Casparian strip
Movement through plasmodesmata
Which combination of factors would MOST effectively enhance the rate of transpiration in a plant?
Low light intensity, high humidity, open stomata, and still air
High light intensity, high humidity, closed stomata, and strong wind
Low light intensity, low humidity, closed stomata, and still air
High light intensity, low humidity, open stomata, and strong wind
If transpiration in a plant is significantly reduced, which of the following is MOST likely to occur?
Increased water uptake by roots
Decreased leaf temperature
Increased transport of minerals
Increased leaf temperature
Girdling experiments, where the bark of a tree is removed in a ring around the trunk, demonstrate the importance of phloem for translocation. Which observation is NOT expected after girdling?
Accumulation of sugars above the girdle.
Swelling of the bark above the girdle.
Eventual death of the roots due to lack of nutrients.
Increased sugar concentration above the girdle and decreased sugar concentration below the girdle, with no effect on xylem function.
Which process is primarily responsible for the loading of sucrose into sieve tube elements?
Active transport
Diffusion
Osmosis
Passive transport
Girdling experiments demonstrate the role of which tissue in the transport of sugars?
Phloem
Xylem
Cambium
Pith
The apoplastic pathway of water transport in plants is interrupted at the endodermis by which structure?
Cell wall
Plasmodesmata
Casparian strip
Plasma membrane
The Casparian strip in the endodermis primarily restricts the movement of water via the:
Apoplast
Symplast
Transmembrane pathway
Vacuolar pathway
The bulk movement of substances through the vascular tissue is called:
Diffusion
Osmosis
Translocation
Imbibition
