Examkin

Question

Difficulty: MediumPlant Biology and Photosynthesis

Match each plant structure to its primary biological function in fluid transport and cellular maintenance:

  • XylemTransports water and dissolved minerals upward from roots to photosynthetic tissues
  • PhloemDistributes dissolved sugars and organic nutrients produced during photosynthesis
  • StomataRegulates gas exchange and water vapor loss through specialized leaf pores
  • Central vacuoleMaintains turgor pressure against the cell wall to support plant rigidity

Answer

Xylem pairs with transporting water and dissolved minerals upward; Phloem pairs with distributing dissolved sugars and organic nutrients; Stomata pair with regulating gas exchange and water vapor loss; Central vacuole pairs with maintaining turgor pressure against the cell wall.
Each structure performs an essential physiological function: xylem moves water and mineral ions upward from roots, phloem distributes synthesized sugars from leaves to sinks, stomata govern carbon dioxide intake and transpiration, and the central vacuole maintains turgor pressure to support plant cell structure.

Step-by-Step Solution

1
Differentiate between the two major vascular transport tissues in plants.
Xylem conducts water and inorganic minerals from the soil upward to the leaves, while phloem conducts dissolved carbohydrates synthesized during photosynthesis throughout the plant body.
Vascular plants require separate continuous conduits for water absorption and photosynthetic assimilate partitioning.
2
Identify the epidermal structure controlling atmospheric gas exchange.
Stomata are surface openings that regulate the intake of carbon dioxide necessary for photosynthesis and control water vapor loss.
Gas exchange occurs across the leaf epidermis via stomatal apertures rather than internal transport conduits.
3
Identify the organelle responsible for structural rigidity in plant cells.
The central vacuole exerts hydrostatic pressure against the rigid cell wall to maintain structural firmness.
Hydration in the large vacuole creates turgor pressure, preventing non-woody plant tissues from wilting.

Key Concept

Plant Vascular Tissues, Gas Exchange Structures, and Turgor Maintenance
Estimated Time:1m 0s
Rate this question

Topics

Plant Biology and Photosynthesis

More questions from this topic