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Questions and Answers
Which solution has a higher water potential?
Which solution has a higher water potential?
- Solution A (correct)
- It is not mentioned in the text
- Both solutions have the same water potential
- Solution B
What is the principle that governs the movement of water?
What is the principle that governs the movement of water?
- Water moves from the region of lower water potential to a region of higher water potential
- It is not mentioned in the text
- Water moves randomly between regions of different water potential
- Water moves from the region of higher water potential to a region of lower water potential (correct)
Which part of the root is at risk of drying up if the entire surface is equally permeable?
Which part of the root is at risk of drying up if the entire surface is equally permeable?
- Upper part of the root
- Middle part of the root
- It is not mentioned in the text
- Lower part of the root (correct)
Which pathway allows water molecules to enter the cytoplasm of the endodermis?
Which pathway allows water molecules to enter the cytoplasm of the endodermis?
What are the channels in the endodermis that facilitate the movement of water into the xylem vessels called?
What are the channels in the endodermis that facilitate the movement of water into the xylem vessels called?
What happens to leaf expansion when there is water shortage?
What happens to leaf expansion when there is water shortage?
What is the programmed process in plants when there is water stress?
What is the programmed process in plants when there is water stress?
Study Notes
Water Potential and Movement
- A higher water potential solution is one that has a higher concentration of water molecules.
- The principle that governs the movement of water is the movement from high water potential to low water potential.
Root Structure and Function
- If the entire surface of the root is equally permeable, the root tip is at risk of drying up.
Endodermis Function
- The symplastic pathway allows water molecules to enter the cytoplasm of the endodermis.
- The channels in the endodermis that facilitate the movement of water into the xylem vessels are called casparian strips.
Plant Response to Water Stress
- When there is a water shortage, leaf expansion is reduced or ceases.
- The programmed process in plants that occurs in response to water stress is apoptosis (cell death).
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Description
Test your knowledge of plant physiology principles with this practice exercise. Determine which solution has a higher water potential based on their respective values. Understand the movement of water and its implications in plant processes.
