The primary mechanism for xylem sap ascent in tall trees is transpiration pull. However, root pressure plays a minor role. Which statement BEST describes the limited contribution of root pressure to overall xylem sap ascent in tall trees?
Root pressure generates excessive pressure that could damage the delicate xylem tissues in tall trees.
Root pressure is only active during the night and therefore cannot contribute to daytime transpiration.
Tall trees have a significantly lower root surface area to volume ratio, minimizing the contribution of root pressure.
Root pressure can only push water a limited height due to the opposing force of gravity and the relatively low pressure generated.
Related Questions
During photosynthesis, carbon dioxide enters the leaf through stomata. What is the primary mechanism by which water vapor exits through the same openings?
Osmosis
Active transport
Transpiration
Capillary action
Which of the following best describes the relationship between the movement of water vapor and carbon dioxide through stomata?
They move in the same direction due to the same concentration gradient.
They move in opposite directions due to the same concentration gradient.
They move simultaneously but due to different concentration gradients.
They move sequentially, with one gas moving only after the other has stopped.
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options:
Both processes cannot happen simultaneously
Both processes can happen together because the diffusion coefficient of water and is different
The above processes happen only during night time
One process occurs during day time, and the other at night
Water vapor exits and carbon dioxide enters a plant leaf through stomata. Which process explains this two-way movement of gases?
Active transport
Osmosis
Transpiration pull
Diffusion
If the stomata of a plant leaf are blocked, which process would be most directly affected, hindering the plant's ability to produce glucose?
Transpiration
Respiration
Photosynthesis
Nutrient absorption
