Multiple Choice
In plant tissue, what are plant cell walls mostly made of?
30
views
18. Cell Junctions and Tissues
Plant Tissue
Multiple Choice
Which plant cell type primarily facilitates gas exchange by regulating the opening and closing of stomata?
A
Guard cells
B
Tracheids
C
Companion cells
D
Sclerenchyma fibers
Verified step by step guidance1
Understand the function of stomata in plants: stomata are small openings on the surface of leaves that allow for gas exchange, including the intake of carbon dioxide and release of oxygen and water vapor.
Identify the cell types listed and their general functions: Tracheids are involved in water conduction, Companion cells assist sieve tube elements in phloem transport, and Sclerenchyma fibers provide structural support.
Focus on the cell type responsible for controlling the opening and closing of stomata, which regulates gas exchange and water loss.
Recall that guard cells are specialized cells that flank each stoma and change shape to open or close the pore, thus directly controlling gas exchange.
Conclude that the plant cell type primarily facilitating gas exchange by regulating stomatal openings is the guard cells.
Related Videos
Related Practice
