A researcher observes that a plant species exhibits a lower transpiration rate and higher water use efficiency (WUE) under high light intensity compared to low light. Which physiological adaptation BEST explains this observation?
Increased leaf thickness
Deeper root system
Increased chlorophyll content
Partial stomatal closure
Related Questions
How do CAM plants minimize the transpiration-photosynthesis compromise?
By increasing the number of stomata on their leaves.
By opening stomata at night and storing CO2 for daytime use.
By having thicker leaves to store more water.
By performing photosynthesis only at night.
Which adaptation is LEAST likely to be found in plants adapted to arid environments?
Sunken stomata
Thick cuticle
Large, thin leaves
Succulence
A researcher observes that a plant species exhibits a lower transpiration rate and higher water use efficiency (WUE) under high light intensity compared to low light. Which physiological adaptation BEST explains this observation?
Increased leaf thickness
Deeper root system
Increased chlorophyll content
Partial stomatal closure
A plant is exposed to high light intensity and limited water availability. Which of the following is the most likely physiological response?
Increased stomatal opening to maximize CO2 uptake for photosynthesis.
No change in stomatal aperture, maintaining a balance between transpiration and photosynthesis.
Complete closure of stomata to prevent water loss, halting photosynthesis.
Partial closure of stomata to reduce transpiration, even at the cost of reduced CO2 uptake for photosynthesis.
What role do stomata play in the transpiration and photosynthesis compromise?
They only allow CO2 intake for photosynthesis.
They only facilitate water loss through transpiration.
They regulate the exchange of gases, including CO2 intake and water vapor release.
They have no role in either transpiration or photosynthesis.
Which environmental factor has the most direct impact on the transpiration and photosynthesis compromise?
Soil pH
Light intensity
Water availability
Temperature
On a hot, dry day, a plant is most likely to:
Open its stomata fully to maximize photosynthesis.
Partially close its stomata to conserve water, even though this reduces photosynthesis.
Completely close its stomata to prevent any water loss.
Increase its rate of photosynthesis to compensate for water loss.
In a CAM plant experiencing prolonged water stress, which adaptation is MOST likely to minimize the transpiration and photosynthesis compromise?
Increased stomatal density
Further temporal separation of CO2 uptake and fixation
Shifting from CAM to C4 photosynthesis
Reducing leaf surface area
The transpiration-photosynthesis compromise is most pronounced in which type of environment?
Cool and humid
Hot and humid
Hot and dry
Cool and dry
If a plant's stomata are completely closed, which of the following would be the most immediate consequence?
Increased transpiration
No CO2 uptake and cessation of photosynthesis
Increased water uptake by roots
Wilting of leaves
