Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 36.3, Problem 3EQ
Summary Introduction
To determine: The reason why Sack and colleagues measured leaf water conduction at two or more places on each leaf.
Introduction: Sack and colleagues conducted an experiment to identify the adaptive advantages provided to plants through palmate venation. For this, the scientists studied water conduction in palmate plant and pinnate plants and compared the results.
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Water potential
a) The value for Ψ in root tissue was found to be -3.3 bars. If you take the root tissue and place it in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the solution, and in which direction would the net flow of water be?
b) NaCl dissociates into 2 particles in water: Na+ and Cl-. If the solution in question 4 contained 0.1M NaCl instead of 0.1M sucrose, what is the Ψ of the solution, and in which direction would the net flow of water be?
c) A plant cell with a Ψs of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a Ψs of -4 bars. What is the cell’s ΨP?
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QUESTION 1
Water potential is the pressure exerted by freely moving water molecules in a
system. Describe the relationship between water potential with solute potential
and
pressure potential in plants.
Plant cell P has a solute potential of-350 kPa and a pressure potential of 200 kPa.
Besides, is plant cell Q which has a solute potential of -500 kPa and a pressure
potential of 200 kPa. Determine the direction of net movement of water between
the two cells by using the water potential equation.
Explain the characteristics of water that make it such an important medium for
life. If an athlete was heavily perspiring after an intense match game, suggest one
type of replacement drink (with explanation) that he should take between
hypertonic, isotonic and hypotonic drink to recover himself.
3:41 AM
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14/8/2021
Visual Skills How do bean and maize seedlings protect their shootsystems as they push through the soil?
Chapter 36 Solutions
Biology
Ch. 36.1 - Prob. 1CSCh. 36.2 - Prob. 1CSCh. 36.2 - Prob. 1CCCh. 36.2 - Prob. 2CSCh. 36.2 - Prob. 3CSCh. 36.3 - Prob. 1CCCh. 36.3 - Prob. 1EQCh. 36.3 - CoreSKILL Why did Sack and colleagues splint...Ch. 36.3 - Prob. 3EQCh. 36.3 - Cactus leaves are so highly modified for defense...
Ch. 36.3 - Prob. 3CCCh. 36.4 - Prob. 1CCCh. 36 - Where would you look to find the gametophyte...Ch. 36 - What is a radicle? a. an embryonic leaf b. an...Ch. 36 - Prob. 3TYCh. 36 - Prob. 4TYCh. 36 - Prob. 5TYCh. 36 - Prob. 6TYCh. 36 - Prob. 7TYCh. 36 - Prob. 8TYCh. 36 - During its development, a tracheid elongates in a...Ch. 36 - What are examples of woody plants? a. trees b....Ch. 36 - Prob. 1CQCh. 36 - What would be the consequences if leaves were...Ch. 36 - Prob. 3CQCh. 36 - Prob. 1COQCh. 36 - Prob. 2COQ
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- Water ascent up a plant is vital for maintaining proper physiological function of the leaves, (a) is root pressure or the cohesion-tension theory MORE important in supplying water to the leaf? (b) explain the difference in the driving force of water ascent between root pressure and cohesion tension.arrow_forwardEXPERIMENT : GRAVIMETRIC ANALYSIS OF PHOSPHORUS IN PLANT FOOD I want Result & Analysis for this experimentarrow_forwardA leaf is placed in a beaker containing a salt solution with a solute potential of -0.5 MPa. Over time the leaf turgor increased to 0.8 MPa at which time the leaf comes into equilibrium with the solution. What is the: 1)Water potential of the solution: 2)Solute potential of the leaf: 3)Water potential of the leaf: 4) pressure potential of the leaf:arrow_forward
- You place a flaccid plant cell (Ψ = -0.7 MPa) into an environment (beaker) of pure (deionized) water (Ψ = 0 MPa). Compare the initial conditions of the flaccid cell and the environment (beaker of pure water) in terms of: G) Predict the direction of water movement (into the cell, out of the cell, or no net movement) H) Predict the change in turgor pressor of the cell (increase turgor pressure or decrease turgor pressure) I) Predict the fate of the cell (plasmolyzed, turgid, or lysed)arrow_forwardAmong the three pathways of water movements in plants, which is the most used? Explain the reasons behind. (i) Figure 1: Water droplets on leaf blades (IPM, University of Missouri) Explain the phenomenon shown in Figure 1 by providing the specific term, elucidating the reason, conditions and plant structure involved. (ii)arrow_forwardHow would you assess leaf water potential? Explain the principle of the method and describe which factors could contribute to false or incorrect readings.arrow_forward
- MAKE CONNECTIONS Plants use statoliths to detectgravity (see Figure 39.22). How do plants and animalsdiffer with regard to the type of compartment in whichstatoliths are found and the physiological mechanism fordetecting their response to gravity?arrow_forwardYou place a flaccid plant cell (Ψ = -0.7 MPa) into an environment (beaker) of pure (deionized) water (Ψ = 0 MPa). Compare the initial conditions of the flaccid cell and the environment (beaker of pure water) in terms of: A) Water potential (high or low) of the environment B) Solute concentration (high or low) of the environment C) Tonicity (hypertonic, hypotonic, or isotonic) of the environment D) Water potential (high or low) of the cell E) Solute concentration (high or low) of the cell F) Tonicity (hypertonic, hypotonic, or isotonic) of the cell G) Predict the direction of water movement (into the cell, out of the cell, or no net movement) H) Predict the change in turgor pressor of the cell (increase turgor pressure or decrease turgor pressure) I) Predict the fate of the cell (plasmolyzed, turgid, or lysed)arrow_forwardFlippase and scramblase play important roles in the movement of lipid molecules across a membrane bilayer. Match each characteristic with its associated phospholipid translocator. Flippase Scramblasearrow_forward
- You place a flaccid plant cell (Ψ = -0.7 MPa) into an environment (beaker) of sucrose solution (Ψ = -0.9 MPa). Compare the initial conditions of the flaccid cell and the environment (beaker of sucrose solution) in terms of: A) Water potential (high or low) of the environment B) Solute concentration (high or low) of the environment C) Tonicity (hypertonic, hypotonic, or isotonic) of the environment D) Water potential (high or low) of the cell E) Solute concentration (high or low) of the cell F) Tonicity (hypertonic, hypotonic, or isotonic) of the cell G) Predict the direction of water movement (into the cell, out of the cell, or no net movement) H) Predict the change in turgor pressor of the cell (increase turgor pressure or decrease turgor pressure) I) Predict the fate of the cell (plasmolyzed, turgid, or lysed)arrow_forwardQuestion: What is the direction of the stem of carrots, potato, turnip, ginger, and onion?arrow_forwardImagine a cell with a water potential of –0.1 MPa being placed in a beaker of solution that also has a water potential of –0.1 MPa. Are the two water potentials in equilibrium? Would any water molecules be moving between the cell and the solution? Would there be a net movement of water? Now imagine a root in moist soil, and imagine that the root cortex cells have a water potential of –0.1 MPa and that the soil solution also has a water potential of –0.1 MPa. Would there be any net movement of water into the root?arrow_forward
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