CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman

CAMPBELL BIOLOGY TENTH EDITION Reece  Urry  Cain  Wasserman

CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 36 Resource Acquisition and Transport in Vascular Plants Clicker Questions by Scott T. Meissner

2014 Pearson Education, Inc. In plants transition to land, which adaptation was LEAST critical for enhancing their survival on land? a) photosynthesis b) the cuticle c) stomata d) sieve-tube elements e) vessel members 2014 Pearson Education, Inc. In plants transition to land, which adaptation was LEAST critical for enhancing their survival on land? a) photosynthesis b) the cuticle

c) stomata d) sieve-tube elements e) vessel members 2014 Pearson Education, Inc. Which statement about the movement of water and inorganic nutrients in plants is TRUE? a) Water and nutrients move from the roots to the leaves via the stem or trunk. b) Water and nutrients move from the leaves to the roots via the stem or trunk. c) Water and nutrients can move either from leaves to roots or from roots to leaves via the stem or trunk. d) Water and nutrients are taken up by the roots and move symplastically by active transport to leaves.

e) Water and nutrients are pumped from the roots to the leaves via a proton pump. 2014 Pearson Education, Inc. Which statement about the movement of water and inorganic nutrients in plants is TRUE? a) Water and nutrients move from the roots to the leaves via the stem or trunk. b) Water and nutrients move from the leaves to the roots via the stem or trunk. c) Water and nutrients can move either from leaves to roots or from roots to leaves via the stem or trunk. d) Water and nutrients are taken up by the roots and move symplastically by active transport to leaves. e) Water and nutrients are pumped from the roots to the leaves via a proton pump.

2014 Pearson Education, Inc. About ____% of a plants water escapes through the stomata, although the stomata account for just ____% of the external leaf surface. a) 75; 10 b) 75; 12 c) 95; 10 d) 95; 12 2014 Pearson Education, Inc. About ____% of a plants water escapes through the stomata, although the stomata account for just ____% of the external leaf surface. a) 75; 10

b) 75; 12 c) 95; 10 d) 95; 12 2014 Pearson Education, Inc. The basis of transpirational pull in the xylem is a) positive root pressure from differences in solute potential between soil and root. b) hydrostatic pressure generated by the shrinking in diameter of the trunk or stem. c) negative pressure at the air-water interface in the leaf. d) pressure created by proton pumping of stomatal guard cells.

e) adhesion tension of water molecules to xylem cell walls. 2014 Pearson Education, Inc. The basis of transpirational pull in the xylem is a) positive root pressure from differences in solute potential between soil and root. b) hydrostatic pressure generated by the shrinking in diameter of the trunk or stem. c) negative pressure at the air-water interface in the leaf. d) pressure created by proton pumping of stomatal guard cells. e) adhesion tension of water molecules to xylem cell walls.

2014 Pearson Education, Inc. Which inequality reflects the correct relationship of water potentials during a sunny day for a typical tree? a) leaf trunk soil b) outside air leaf mesophyll root c) leaf trunk soil d) soil root leaf 2014 Pearson Education, Inc. Which inequality reflects the correct relationship of water potentials during a sunny day for a typical tree? a) leaf trunk soil b) outside air leaf mesophyll root c) leaf trunk soil

d) soil root leaf 2014 Pearson Education, Inc. Water can follow two pathways in plants, apoplastic and symplastic routes. How do these pathways differ? a) The apoplastic route is for water and the symplastic route is for nutrients. b) The apoplastic route is entirely external to cell membranes, while the symplastic route is inside of cells. c) The apoplastic route is for nutrients and the symplastic route is for water. d) The apoplastic route is used in phloem and the symplastic route in xylem.

2014 Pearson Education, Inc. Water can can follow two pathways in plants, apoplastic and symplastic routes. How do these pathways differ? a) The apoplastic route is for water and the symplastic route is for nutrients b) The apoplastic route is entirely external to cell membranes, while the symplastic route is inside of cells. c) The apoplastic route is for nutrients and the symplastic route is for water. d) The apoplastic route is used in phloem and the symplastic route in xylem. 2014 Pearson Education, Inc.

Which choice CORRECTLY identifies a benefit a plant may gain from how it positions and aligns its leaves relative to each other along its stems? a) A layer of still air can be created under the leaves, raising the O2 concentration found there. b) More water can be lost from the surface of the leaves during the day. c) Proper positioning can allow more light down to the lower leaves on the plant. d) Certain arrangements can allow the plant to maximize its leaf area index (LAI). e) On hot sunny days, horizontally aligned leaf blades tend to be kept cooler. 2014 Pearson Education, Inc.

Which choice CORRECTLY identifies a benefit a plant may gain from how it positions and aligns its leaves relative to each other along its stems? a) A layer of still air can be created under the leaves, raising the O2 concentration found there. b) More water can be lost from the surface of the leaves during the day. c) Proper positioning can allow more light down to the lower leaves on the plant. d) Certain arrangements can allow the plant to maximize its leaf area index (LAI). e) On hot sunny days, horizontally aligned leaf blades tend to be kept cooler. 2014 Pearson Education, Inc. Which of the following correctly lists the pathways of water flow

through typical parenchyma tissue in order from the path of greatest resistance to water flow to the one that is least resistant? a) transmembrane, symplastic, apoplastic b) apoplastic, transmembrane, symplastic c) symplastic, transmembrane, apoplastic d) symplastic, apoplastic, transmembrane e) transmembrane, apoplastic, symplastic

2014 Pearson Education, Inc. Which of the following correctly lists the pathways of water flow through typical parenchyma tissue in order from the path of greatest resistance to water flow to the one that is least resistant? a) transmembrane, symplastic, apoplastic b) apoplastic, transmembrane, symplastic c) symplastic, transmembrane, apoplastic

d) symplastic, apoplastic, transmembrane e) transmembrane, apoplastic, symplastic 2014 Pearson Education, Inc. In most vascular plants the xylem and phloem tissues are very close to each other (see figure) and have the same water potential. Which choice gives the correct comparison of their typical solute (s) and pressure (p) potentials in a plant on a sunny day? a) xylem s phloem s; xylem p phloem p b) xylem s phloem s; xylem p phloem p

c) xylem s = phloem s; xylem p < phloem p d) xylem s < phloem s; xylem p < phloem p e) xylem s phloem s; xylem p < phloem p 2014 Pearson Education, Inc. In most vascular plants the xylem and phloem tissues are very close to each other (see figure) and have the same water potential. Which choice gives the correct comparison of their typical solute (s) and pressure (p) potentials in a plant on a

sunny day? a) xylem s phloem s; xylem p phloem p b) xylem s phloem s; xylem p phloem p c) xylem s = phloem s; xylem p < phloem p d) xylem s < phloem s; xylem p < phloem p e) xylem s phloem s; xylem p < phloem p 2014 Pearson Education, Inc.

Which choice gives a CORRECT distinction between the root pressure (RP) mechanism and the cohesiontension (CT) mechanism of flow in xylem? a) The RP system uses the symplastic route of water flow, while the CT mechanism uses the apoplastic route. b) In the RP system the Casparian strip helps to keep unwanted items out of the stele, while in the CT mechanism it helps keep desired items in the stele. c) The TC system is much more dependent on solute potential of the xylem sap than is the RP mechanism. d) To generate root pressure the root must power its production, while the tension costs the plant much less to be formed. e) The RP system results in faster rates of flow at night than does the CT system during a sunny day. 2014 Pearson Education, Inc.

Which choice gives a CORRECT distinction between the root pressure (RP) mechanism and the cohesiontension (CT) mechanism of flow in xylem? a) The RP system uses the symplastic route of water flow, while the CT mechanism uses the apoplastic route. b) In the RP system the Casparian strip helps to keep unwanted items out of the stele, while in the CT mechanism it helps keep desired items in the stele. c) The TC system is much more dependent on solute potential of the xylem sap than is the RP mechanism. d) To generate root pressure the root must power its production, while the tension costs the plant much less to be formed. e) The RP system results in faster rates of flow at night than does the CT system during a sunny day. 2014 Pearson Education, Inc.

Consider a water molecule starting in the soil. If you order the following structures it is likely to encounter from first encountered to last, which would be third in order? a) Casparian strip b) a root hair c) cell wall of a mesophyll cell d) vessel member in xylem tissue e) air inside of a leaf 2014 Pearson Education, Inc. Consider a water molecule starting in the soil. If you order the following structures it is likely to encounter

from first encountered to last, which would be third in order? a) Casparian strip b) a root hair c) cell wall of a mesophyll cell d) vessel member in xylem tissue e) air inside of a leaf 2014 Pearson Education, Inc. Other than the use of sunlight in photosynthesis, which choice is NOT another way many plants use sunlight? a) in sensing how to best align their leaves throughout the day b) to drive transpiration-powered flow in its xylem

tissue c) in helping to determine whether to open or close their stomata d) to set their "internal clock," which influences many metabolic processes e) to cool their leaves by using light to promote evaporative cooling 2014 Pearson Education, Inc. Other than the use of sunlight in photosynthesis, which choice is NOT another way many plants use sunlight? a) in sensing how to best align their leaves throughout the day b) to drive transpiration-powered flow in its xylem tissue c) in helping to determine whether to open or close

their stomata d) to set their "internal clock," which influences many metabolic processes e) to cool their leaves by using light to promote evaporative cooling 2014 Pearson Education, Inc. Which of the following is NOT a function resulting from the action of guard cells? a) Lower the loss of water upon detecting certain signals from water-stressed roots. b) Keep the leaves at a more positive water potential relative to the roots. c) Allow an optimal rate of photosynthesis to occur by letting CO2 to enter the leaf.

d) Permit cooling of the leaf by the evaporative loss of water. e) Allow water to exit the leaf and so generate tension in the xylem tissue. 2014 Pearson Education, Inc. Which of the following is NOT a function resulting from the action of guard cells? a) Lower the loss of water upon detecting certain signals from water-stressed roots. b) Keep the leaves at a more positive water potential relative to the roots. c) Allow an optimal rate of photosynthesis to occur by letting CO2 to enter the leaf.

d) Permit cooling of the leaf by the evaporative loss of water. e) Allow water to exit the leaf and so generate tension in the xylem tissue. 2014 Pearson Education, Inc. If you order the following events from first to last, which would normally occur third? a) Bulk flow occurs in the sieve tube down its pressure gradient. b) Osmosis occurs. c) Pressure builds up in the sieve tube at its source end. d) Sugar and other solutes are

loaded into the sieve tube. e) Items are unloaded into sink tissues. 2014 Pearson Education, Inc. If you order the following events from first to last, which would normally occur third? a) Bulk flow occurs in the sieve tube down its pressure gradient. b) Osmosis occurs. c) Pressure builds up in the sieve tube at its source end. d) Sugar and other solutes are loaded into the sieve tube. e) Items are unloaded into sink

tissues. 2014 Pearson Education, Inc. Why might it be more efficient for a plant that uses just the apoplastic phloem loading mechanism to close any plasmodesmata between the phloem parenchyma cells and the companion cells? a) The operation of plasmodesmata is expensive, so closing them benefits the plant. b) Closing these plasmodesmata keeps the sucrose put into the companion cell from diffusing back out to the parenchyma cell.

c) This allows the companion cell more surface area for the uptake of sucrose from the apoplast. d) With these plasmodesmata closed, the concentration of sucrose in mesophyll cell can become higher. e) Movement of the sucrose through the apoplast is faster and cheaper

than through the symplast. 2014 Pearson Education, Inc. Why might it be more efficient for a plant that uses just the apoplastic phloem loading mechanism to close any plasmodesmata between the phloem parenchyma cells and the companion cells? a) The operation of plasmodesmata is expensive, so closing them benefits the plant. b) Closing these plasmodesmata keeps the sucrose put into the companion cell from diffusing back out to the parenchyma cell.

c) This allows the companion cell more surface area for the uptake of sucrose from the apoplast. d) With these plasmodesmata closed, the concentration of sucrose in mesophyll cell can become higher. e) Movement of the sucrose through

the apoplast is faster and cheaper than through the symplast. 2014 Pearson Education, Inc. Which is NOT a typical adaptive function of phloem in vascular plants? a) Pass organic matter from sink to physiological source for storage. b) Transmit electrical signals between organs of the plant. c) Carry hormones from one organ to another. d) Carry various types of RNAs for use in other parts of the plant. e) Pass information about an ongoing infection to the rest of the plant.

2014 Pearson Education, Inc. Which is NOT a typical adaptive function of phloem in vascular plants? a) Pass organic matter from sink to physiological source for storage. b) Transmit electrical signals between organs of the plant. c) Carry hormones from one organ to another. d) Carry various types of RNAs for use in other parts of the plant. e) Pass information about an ongoing infection to the rest of the plant. 2014 Pearson Education, Inc.

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