Multiple Choice
Which of the following correctly describes a feature unique to monocot stems?
33. Plant Anatomy
Tissues
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Guard cells __________.
A
are necessary for water absorption from the environment
B
protect the plant's roots from infection
C
control water and solute intake by roots
D
The first and second responses are correct.
E
reduce evaporative water loss through the stomata
Verified step by step guidance1
Understand the role of guard cells in plant physiology. Guard cells are specialized cells located on the leaf surface surrounding the stomata, which are small openings that allow gas exchange.
Recognize that the primary function of guard cells is to regulate the opening and closing of stomata. This regulation is crucial for controlling water loss and gas exchange in plants.
Consider the process of transpiration, where water vapor exits the plant through the stomata. Guard cells help minimize water loss by closing the stomata when water conservation is necessary.
Evaluate the options given in the problem. The first three options relate to water absorption, root protection, and solute intake, which are not directly related to the primary function of guard cells.
Conclude that the correct function of guard cells is to reduce evaporative water loss through the stomata by controlling their opening and closing, thus maintaining water balance in the plant.
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