Water Uptake and Response to Water Stress in Plants

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Questions and Answers

Which of the following is an example of water potential component?

  • Plasmolysis
  • Solute potential
  • Turgor pressure
  • Pressure potential (correct)

Pure water has a higher water potential than which solution?

  • 0.1 M sucrose solution (correct)
  • 0.001 M sucrose solution
  • 0.01 M sucrose solution
  • 0.0001 M sucrose solution

Which solution has a lower water potential?

  • Pure water
  • 0.001 M sucrose solution
  • 0.1 M sucrose solution (correct)
  • 0.01 M sucrose solution

In which direction does water move between two solutions with different water potentials?

<p>From hypotonic to hypertonic solution (B)</p> Signup and view all the answers

Under what conditions would soil solution move into the root cells?

<p>When the soil solution has more solutes (D)</p> Signup and view all the answers

Which solution is hypotonic in relation to the other solution?

<p>Solution A (D)</p> Signup and view all the answers

What is the principle that determines the direction of water flow?

<p>Water moves from high water potential to lower water potential (C)</p> Signup and view all the answers

Which principle is being applied in the study of water uptake along a pumpkin root?

<p>Principle of water movement (C)</p> Signup and view all the answers

What is the purpose of the study on the tissue organization in roots?

<p>To understand the pathways for water uptake by roots (A)</p> Signup and view all the answers

How can water cross plant membranes?

<p>By diffusion (C)</p> Signup and view all the answers

What is the main factor contributing to potential water stress in plants?

<p>Soil water deficit (C)</p> Signup and view all the answers

What is the response of young cotton plants to water stress?

<p>Increased abscission (B)</p> Signup and view all the answers

What is the effect of water stress on photosynthesis and leaf expansion in sunflower?

<p>Decreased photosynthesis (C)</p> Signup and view all the answers

Which plant hormone is compared in the growth study of normal vs. ABA-deficient maize plants?

<p>Abscisic acid (B)</p> Signup and view all the answers

Under what conditions is the water potential of plants measured?

<p>Under various growing conditions (A)</p> Signup and view all the answers

Which of the following is a pathway for water uptake by the root?

<p>Diffusion (A)</p> Signup and view all the answers

Which factor contributes to potential water stress in plants?

<p>Soil water deficit (C)</p> Signup and view all the answers

What is the purpose of studying the tissue organization in roots?

<p>To understand water movement (A)</p> Signup and view all the answers

What is the response of young cotton plants to water stress?

<p>Abscission (B)</p> Signup and view all the answers

What is the effect of water stress on photosynthesis and leaf expansion in sunflower?

<p>Decreased photosynthesis and leaf expansion (D)</p> Signup and view all the answers

What is the main factor that determines the direction of water flow?

<p>Water potential (B)</p> Signup and view all the answers

Which plant hormone is compared in the growth study of normal vs. ABA-deficient maize plants?

<p>ABA (A)</p> Signup and view all the answers

Which solution has a lower water potential?

<p>Soil water deficit (D)</p> Signup and view all the answers

Which component of water potential is responsible for the turgor pressure in a turgid cell without sign of plasmolysis?

<p>Pressure potential (B)</p> Signup and view all the answers

Which solution has a higher water potential when compared to a 0.1 M sucrose solution?

<p>Pure water (D)</p> Signup and view all the answers

Which solution would be considered hypotonic in relation to the other solution when separated by a membrane?

<p>Solution A with more water and less solutes (C)</p> Signup and view all the answers

Which solution has a lower water potential when compared to the other solution when separated by a membrane?

<p>Solution B with less free water and more solutes (C)</p> Signup and view all the answers

Which direction does water move between two solutions with different water potentials?

<p>From hypotonic to hypertonic solution (C)</p> Signup and view all the answers

Under what conditions would soil solution move into the root cells?

<p>When the soil solution has more solutes (B)</p> Signup and view all the answers

What is the principle that determines the direction of water flow?

<p>Water potential gradient (A)</p> Signup and view all the answers

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