Loose-leaf Version for What Is Life? A Guide to Biology
4th Edition
ISBN: 9781319106317
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 19, Problem 9MC
Summary Introduction
Introduction:
Plants use their roots to absorb the minerals that are present in the soil.
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Which statement(s) is/are false? *
A. A water potential lower than that of the soil draws water into the roots and a water potential lower than that of the stem draws water into the leaf.
B. A water potential lower than that of the soil draws water into the roots and a water potential higher than that of the stem draws water into the leaf.
C. Water potential and solute concentration increases from the roots to the top of the plant.
D. Water enters the plant through the root hairs and exits through the lenticels and stomates.
E. A and D
F. B and C
Soil pH affects availability of nutrients for root absorption. The following statements are true except*
a. Low pH results in an increase in Aluminum toxicity.
b. Low pH results to unavailability of major nutrient elements.
c. Toxic metals are more available in acidic soil.
d. Low pH results in slow activity of soil-inhabiting microorganisms.
The following statements are correct except*
a. Assimilates are transported from areas of supply to areas of metabolism or storage.
b. The transport of assimilates in the phloem is bi-directional.
c. Allocation is the distribution of assimilates to competing sinks.
d. Sugars, phytohormones and amino acids are transported in the phloem.
Chapter 19 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements is inaccurate?a. Water that evaporates from leaves is ultimately replaced by water diffusing from the xylem.b. Xylem transports water up the plant while phloem transports carbohydrates throughout the plant.c. Water movement in the xylem is largely due to the pressure-flow hypothesis.d. Water movement across membranes is often due to differences in solute concentrations.arrow_forwardChoose the statements that apply to transpiration in the cohesion-tension theory. (Check all that apply) Check All That Apply The H-bonds in water allow for cohesion. Water pressure builds in roots to drive water up the plant. Exposed water in leaves evaporates into drier air. Water forms a continuous stream from leaf into the root. In addition to water, heat is lost cooling the plant during transpiration.arrow_forwardIn plants, water is transported through vessels called xylern. The cohesiveness of water molecules allows them to travel up the walls of the vessel. However, for most plants this is not enough to move the water all the way to the top of the plant. How do plants overcome the force of gravity and move water to their upper tissues ? Root hairs push water through the roots and up into the xylem. Plants absorb water through transpiration to supply their upper tissues with water . С The guard cells surrounding the stomata expand and contract, pushing water through the xylem. Water escapes from the leaves through transpiration, creating a vacuum which pulls water up the xylem.arrow_forward
- Which of the following would require active transport? Select one: O a. Stomata opening b. Potassium moving through an ion channel O c. Water moving through aquaporins O d. Water diffusing into xylem from the root e. The tension in the leaf caused by evaporating waterarrow_forwardWhich of the following pathways best summarizes the route of a mineral that isabsorbed by a plant? a. Root hairs → epidermis → cortex → endodermis → pericycle → xylem b. Root hairs → epidermis → endodermis → cortex → xylem c. Root hairs → pericycle → endodermis → cortex → xylem d. Root hairs → endodermis → cortex → pericycle → xylemarrow_forwardAccording to the pressure-flow model, sugar is actively transported into phloem anda. enters xylem, where it is moved toward the leaves due to transpiration.b. creates pressure to move water toward the roots.c. is transported out of the leaves through stomata.d. water follows by osmosis, providing pressure that moves the water and sugar through the phloem.arrow_forward
- Water potential is (a) the formation of a proton gradient across a cell membrane (b) the transport of a watery solution of sugar in phloem (c) the transport of water in both xylem and phloem (d) the removal of sucrose at the sink, causing water to move out of the sieve tubes (e) the free energy of water in a particular situationarrow_forwardPermanent Wilting point occurs at a water concentration when Group of answer choices a. The water attached to the soil particle can’t be pulled off by the plant. b. When the soil is saturated c. All free water has drained from the soil and that remaining is held to the soil particle against gravitational pull. d) All of the abovearrow_forwardDraw a simple flow diagram or sketch to illustrate the flow path of water through a plant, from the point of uptake from the soil to transpiration and… (read in image below)arrow_forward
- Imagine you have a plant with a water potential of -0.1 MPa in the root tissue. What would happen if you place the roots of this plant in a 0.1 M solution of sucrose (water potential is -0.23 MPa)? The net water flow would be from the tissue into the sucrose solution The net water flow would occur only as ATP was hydrolyzed in the tissue The net water flow would be from the sucrose solution into the tissue The net water flow would be in both directions and the concentration of water would remain equal The net water flow would be impossible to determine from the values given herearrow_forwardDescribe how the water potential of a leaf changes throughout the course of a 24-hour period. What is driving this change? How does the water potential of this leaf compare to the water potential of a root in the same plant during the same period? How does it compare to the soil underneath the plant? Please fast and properly explain.arrow_forward(3) a. b. The characteristics of water molecules to maintain a continuous column of water is: a. Root pressure b. Transpiration C. d. Forces Cohesion - Addison The reason for my answer is because : a. Releasing water as water vapors b. A pressure excreted by root through root system C. Releasing water from tips of leaves as liquid d. Interaction among water molecules and adsorption of water molecules to walls of xylem vesselsarrow_forward
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