What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 17, Problem 7MC
Summary Introduction
Introduction:
Leaves are coated with a waxy substance called the cuticle that helps to reduce water loss.
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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.
Plants obtain water and nutrients from the soil.a. What structure in a plant uses water in a metabolic reaction? What is this metabolic process called? b. Describe in detail two mechanisms by which water can move from the roots to this location c. If a plant was exposed to saltwater, how would it affect the above processes? Be specific, including a discussion of water potential d. How do plants absorb minerals from the soil? Does this process require energy?
These plant cells have only primary cell walls and are important as the site of photosynthesis:
Select one:
O a. Collenchyma
Ob. Sclerenchyma
O c. Parenchyma
d. Fibers
e. Sclerids
Chapter 17 Solutions
What is Life? A Guide to Biology with Physiology
Ch. 17 - Prob. 1SACh. 17 - Prob. 2SACh. 17 - Prob. 3SACh. 17 - Prob. 4SACh. 17 - Prob. 5SACh. 17 - Prob. 6SACh. 17 - Prob. 7SACh. 17 - Prob. 8SACh. 17 - Prob. 9SACh. 17 - Prob. 10SA
Ch. 17 - Prob. 11SACh. 17 - Prob. 12SACh. 17 - Prob. 13SACh. 17 - Prob. 14SACh. 17 - Prob. 1MCCh. 17 - Prob. 2MCCh. 17 - Prob. 3MCCh. 17 - Prob. 4MCCh. 17 - Prob. 5MCCh. 17 - Prob. 6MCCh. 17 - Prob. 7MCCh. 17 - Prob. 8MCCh. 17 - Prob. 9MCCh. 17 - Prob. 10MCCh. 17 - Prob. 11MCCh. 17 - Prob. 12MCCh. 17 - Prob. 13MCCh. 17 - Prob. 14MC
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- Which of the following statements is/are FALSE for CAM plants? a.The dark reaction uses less ATP and NADPH than other plants. b.Succulents and tropical plants growing under semi-arid condition. c.C4 pathway occurs at night and C3 pathway occurs at daytime. d.Scotoactive stomata are open during daytime but close at nighttime.arrow_forwardIn a lab, a scientist would like to explore the effect of solute concentration in the xylem on sugar transport in a plant. He adds salts and minerals to the xylem tissue to increase the solute concentration and a radioactive substance to the leaves that are incorporated into the sugars during photosynthesis. At some point he adds a substance to detect the radioactive material and finds that it is all still situated in the leaves and has not been transported to the sink. Explain, using the pressure flow or mass flow hypothesis why the sugar has not been transported to the sink (4).arrow_forwardWhich 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_forward
- Sucrose enters the phloem tubes from mesophyll cells in the leaf by: O a. Proton pumps (hydrogen ions are pumped out as sucrose is pumped in). O b. Sucrose pumps. Oc. Co-transport with hydrogen ions. O d. Diffusion down a gradient. O e Osmosis (water carrying the sucrose is sucked in).arrow_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_forwardOpening and closing of pores is a function performed by: I. Stomata II. Chlorophyll III. Chloroplast IV. Guard cellsarrow_forward
- Which of the following is True?a. Chloroplasts are found primarily in leaf mesophyll cells.b. The space between the outer and inner membranes chloroplasts is called the thylakoid space.c. Mesophyll cells in the leaf’s center are packed tightly together.d. Vascular bundles of the leaf circulate CO2 and O2.arrow_forwardWhich of the following resource(s) do plants need to survive (select all that apply): A. O2 for cellular respiration B. nitrogen and minerals as molecular building blocks C. Glucose for cellular respiration D. CO2 for photosynthesis E. H2O for structure and turgor pressurearrow_forwardWhich of the following is true for the function of xylem and phloem? * A. Xylem transports water from leaves to roots; phloem transports sugar from roots to leaves B. Xylem transports sugar from roots to leaves; phloem transports water from leaves to roots C. Xylem transports water from roots to leaves; phloem transports sugar from leaves to roots D. Xylem transports sugar from leaves to roots; phloem transports water from roots to leavesarrow_forward
- Photorespiration becomes more likely when a. CO2 concentrations are high in leaf cells. b. stomata remain closed in C3 plants. c. glucose concentrations are low in leaf cells. d. ATP binds to rubisco.arrow_forwardWhich of the following would allow a plant to tolerate a cold environment? Group of answer choices A. producing small, smooth leaves with a small boundary layer B. generating sparsely placed leaf hairs to reflect solar radiation C. increasing the proportion of unsaturated fatty acids in cell membranes D. increasing evapotranspiration E. increasing the proportion of leaf mass relative to total body massarrow_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
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