WorksheetsPlant Transport and Phloem Translocation Quiz
Total questions: 20
Worksheet time: 10mins
What is the tissue that translocates assimilates from mature leaves to growing or storage organs and roots?
Epidermis
Cambium
Phloem
Xylem
What is the movement of carbohydrate through the phloem from sources to sinks called?
Translocation
Transpiration
Respiration
Photosynthesis
What is the carbohydrate and nutrient-rich fluid moved through the phloem called?
Root pressure sap
Xylem sap
Phloem sap
Stomatal sap
Which process involves the transport of solutes from sources into sieve tubes?
Unloading
Loading
Transpiration
Photosynthesis
What is the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes?
Osmosis
Active transport
Homeostasis
Diffusion
What is the shoot:root DM ratio very quickly established under different scenarios?
Homeostasis
Active transport
Osmosis
Diffusion
What is the process called when sugars are transported into the sieve elements and companion cells?
Phloem loading
Xylem loading
Photosynthesis
Transpiration
What is the net effect of severe grazing on root growth?
Reduction in total absorptive area of roots
Increase in total absorptive area of roots
Increase in soil volume explored for soil resources
No effect on root growth
What is the process called when sugars move from the mesophyll cell via the smallest veins in the leaf to near the sieve elements?
Short distance pathway
Long distance transport
Symplastic route
Apoplastic pathway
What is the process by which plants absorb water from the soil?
Osmosis
Active transport
Homeostasis
Diffusion
What is the movement of water through a plant from the roots to the leaves called?
Transpiration
Photosynthesis
Respiration
Translocation
What is the process by which plants convert light energy into chemical energy to produce food?
Transpiration
Photosynthesis
Respiration
Translocation
How does drought stress affect biomass partitioning in plants?
Favors partitioning to the root
Favors partitioning to the shoot
Does not affect partitioning
Reduces overall biomass
What is the effect of severe defoliation on root growth in plants?
Increases root growth
Decreases root growth
No impact on root growth
Promotes lateral root development
Which of the following is not a component of the phloem?
Sieve tube elements
Companion cells
Tracheids
Sieve plates
What drives the movement of sap in the phloem according to the pressure flow model?
Gravity
Capillary action
Turgor pressure
Electrochemical gradients
Which factor predominantly affects assimilate partitioning in plants?
Soil pH
Air humidity
Environmental factors like light and temperature
Leaf color
In a mature plant, what typically acts as the primary source for translocation?
Roots
Fruits
Flowers
Mature leaves
What defines a 'sink' in the context of assimilate partitioning in plants?
A region producing excess carbohydrates
A region requiring carbohydrates
A region conducting water
A region where photosynthesis occurs
According to the Functional Balance Hypothesis, increased photosynthetic activity in the shoot should be balanced by:
Decreased root mass
Increased root mass
Stagnant root growth
Reduced nutrient uptake
