Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 39, Problem 6TY
Which of the following statements best explains how water enters root cells from the soil?
- a. Roots accumulate sugars from shoots, thereby increasing root cell ability to absorb water by osmosis.
- b. Roots actively pump water from the soil using the chemical energy of ATP.
- c. Water enters the spongy spaces between cells and within cell walls.
- d. Membrane-level transport of ions from soil into root hair cells increases the osmotic flow of water into them.
- e. Both c and d are correct.
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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 root
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 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…
Chapter 39 Solutions
Biology
Ch. 39.2 - Describe the direction of water movement when a...Ch. 39.3 - Prob. 1CSCh. 39.4 - Prob. 1CSCh. 39.4 - Prob. 1CCCh. 39.4 - Prob. 2CCCh. 39.4 - Prob. 3CCCh. 39.4 - Prob. 4CCCh. 39.4 - Prob. 5CCCh. 39.4 - Prob. 1EQCh. 39.4 - Prob. 2EQ
Ch. 39.4 - Prob. 6CCCh. 39.4 - Core Skill: Connections Look back to Figure 36.16,...Ch. 39 - Prob. 1TYCh. 39 - Prob. 2TYCh. 39 - Prob. 3TYCh. 39 - Prob. 4TYCh. 39 - Prob. 5TYCh. 39 - Which of the following statements best explains...Ch. 39 - What features of water explain how it can be drawn...Ch. 39 - Prob. 8TYCh. 39 - Prob. 9TYCh. 39 - Prob. 10TYCh. 39 - Prob. 1CQCh. 39 - Prob. 2CQCh. 39 - Prob. 3CQCh. 39 - Prob. 1COQCh. 39 - Prob. 2COQ
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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
- In 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_forwardImagine 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_forward(b) Water absorbed by plant roots travels by different pathways from the root hairs to the xylem. Figure 5 shows these pathways in a plant root. cell A xylem vessel root hair key pathway B Tissue D Tissue E * pathway C Figure 5: Schematic representation of water movement through the tissues of a plant root (PLEASE TURN OVER) Page 6 CONT'D from Page 5 i. Explain how water moves from the root hair to the xylem vessels in the root. ii. Identify cellA, pathway B, pathway C, tissue D and tissue E in Figure 5.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_forwardAfter sucrose enters sieve tubes,a. it is removed by the source.b. water follows passively by osmosis.c. it is driven by active transport to the source, which is usuallythe roots.d. stomata open so that water flows to the leaves.e. All of these are correct.arrow_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_forward
- Which of the following statements is/are false? A. Water is actively transported from source cells into companion cells. B. The transport of sucrose into the Osieve tube elements increases water potential in the phloem. C. The transport of water from the xylem into the phloem increases the O pressure which forces the sucrose water mixture down towards the sink. D. Transpiration cause the water to O move up to the leaves through the vessel elements. E. A and B F. B and Carrow_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_forwardWhat are ways in which plants accomplish tissue-level transport?a. transmembrane transport of solutes from one cell to anotherb. symplastic transport of materials from one cell to another viaplasmodesmatac. apoplastic transport of water and dissolved solutes through cell wallsand intercellular spacesd. All of the above are used for tissue-level transport.e. None of the above are used for tissue-level transport.arrow_forward
- Which 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_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_forwardWhich of the following is true of the water potential of a healthy living plant cell? ( SELECT ALL THAT APPLY) A. It has a higher solute potential (lower solute concentration) than the extracellular environment B. It is under negative pressure C. It has a lower solute potential (high solute concentration) than the extracellular enviroment D. It is under positive pressure E. It has a pressure potential equal to zeroarrow_forward
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