Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 34, Problem 7TYK
Summary Introduction
Introduction:
Long distance transport mechanisms are responsible for the movement of water and food throughout the plant. It is mediated by vascular tissues, phloem, and xylem. Xylem is involved in the transport or conductance of water from the root to the upper stem portions of the plants while phloem is responsible for the transport of food from the leaves to the other parts of the plants.
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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.
Which of the following statements is CORRECT?Aquaporins:a. play an active role in the regulation of water movement in the xylem during mild droughtb. are proteins embedded in the cell walls that transport waterc. play an active role in the regulation of water movement outside the xylem during mild droughtd. are proteins embedded in the mesophyll and bundle sheath apoplast that transport water
(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 vessels
Chapter 34 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 34.1 - Prob. 1SBCh. 34.1 - Prob. 2SBCh. 34.1 - Explain how the apoplastic, symplastic, and...Ch. 34.2 - Prob. 1SBCh. 34.2 - Prob. 2SBCh. 34.3 - Prob. 1SBCh. 34.3 - Prob. 2SBCh. 34.3 - Prob. 3SBCh. 34.4 - Prob. 1SBCh. 34.4 - Prob. 2SB
Ch. 34.5 - Compare and contrast translocation and...Ch. 34.5 - Prob. 2SBCh. 34 - Prob. 1TYKCh. 34 - Prob. 2TYKCh. 34 - Prob. 3TYKCh. 34 - Prob. 4TYKCh. 34 - Prob. 5TYKCh. 34 - Prob. 6TYKCh. 34 - Prob. 7TYKCh. 34 - Prob. 8TYKCh. 34 - An indoor gardener leaving for vacation completely...Ch. 34 - Prob. 10TYKCh. 34 - Prob. 11TYKCh. 34 - Prob. 12TYKCh. 34 - Discuss Concepts Concerns about global climate...Ch. 34 - Prob. 14TYKCh. 34 - Apply Evolutionary Thinking A variety of...Ch. 34 - Prob. 1ITDCh. 34 - Prob. 2ITDCh. 34 - Prob. 3ITD
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- 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_forwardWhat role do cohesion and adhesion play in xylem transport?a. Like transpiration, they create a tension.b. Like root pressure, they create a positive pressure.c. Like sugars, they cause water to enter xylem.d. They create a continuous water column in xylem.e. All of these are correct.arrow_forwardWhich one of the following statements about root hairs is CORRECT? Select one: a. They are found in the zone of cell elongation and help the root to fix nitrogen. b.They are found in the root cap and help the root sense gravity. c.They are found in the zone of cell division of the root and help anchor the plant in the soil. d.They are found in the root apical meristem and help the root to absorb water. e.They are found in the zone of cell differentiation in the root. Which of the following best describes the route to fruit formation in flowering plants? Select one: a. 1) pollination, 2) double fertilization, 3) embryo develops, 4) ovary matures, 5) ovule matures. b. 1) pollination, 2) germination of pollen, 3) endosperm develops, 4) ovule develops. c. 1) pollination, 2) endosperm develops, 3) embryo develops, 4) ovule matures. d. 1) pollination, 2) fertilization, 3) embryo develops, 4) ovary matures. e.1) pollination, 2) fertilization, 3) germination of pollen, 4) ovule…arrow_forward
- Water movement through the xylem needs less pressure than movement through living cells. A. Agree, because water moves in xylem through diffusion. B. Disagree, because water needs turgor pressure in order to diffuse. D. Disagree, beacuse both need equal pressure for materials to pass through xylem and living cells like sievetubes. C. Agree, because water is non-living while photosynthates are living and must pass through living cells that require pressure.arrow_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_forwardWhich 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 Carrow_forward
- Which of the following is/are true? I. A measure of how much water is present in comparison with the solute molecules in the same volume of solution known as diffusion gradient II. The region found above the region of cell division can be seen in different young roots because of the presence of numerous root hairs that increase absorption. III. The meristematic region is has cells that elongate several times their original length and push the root tip through the soil. IV. The meristematic region is the growing apex of the rootarrow_forwardWhich 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 is/are false regarding the phloem? A. It transports starch from the leaves to the stem. B. It transports sucrose from the leaves to the roots. C. It is located lateral to the xylem in tree stems. D. Unlike the xylem, majority of the cells are living. E. A and D F. B and Carrow_forward
- When absorption of water by the roots fails to keep up with the rate of transpiration, gain in turgor occurs, and the stomata close. A. Agree, because the transpiration occurs faster than root absorption. D. Disagree, because the condition should be when root absorption is able to keep up with transpiration, then stomates close. B. Disagree, because under this condition, the turgor pressure decreases and the stomates close. C. Agree, because increase in turgor pressure under this condition, closes the stomates.arrow_forwardThe movement of water out of phloem sap and back into xylem vessels is often associated with which of the following events? active transport of water out of the phloem sap into a source а. b. passive diffusion of phloem sap into a source active transport of sugars out of the phloem sap into a sink C. hydrostatic push (pressure) forcing phloem sap into a sink Od.arrow_forwardA complex polysaccharide that provides flexibility to plant cell walls is: Glucose Pectin Starch Sucrose Roots branching from existing roots are called: Adventitious roots Taproots Meristem roots Parenchyma roots Plant stomata are regulated by: Humidity Hormonal signals Guard cells All of the above Xylem tissue conducts: Water Minerals Sugars Both a. and b. The element nitrogen is important in producing the plant nutrient: Carbon dioxide Glucose Ammonia Phosphorus The female plant reproductive organ is called: Anther Carpel Style Stamen A fertilized flowering plant is represented by what genetic chromosome number: 4n n 2n 3n Vernalization is a plant response to: Light Gravity Physical contact None of the above Plant epidermis secretes a waterproof substance called: Cuticle Wax Periderm covering Pectin Plant transpiration accounts for what % of atmospheric water vapor? 50% 90% 5% 75%arrow_forward
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