Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Which 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 C
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- Match the dietary elements provided by plants to the most accurate description of them (role in humans, type of compound, plant source etc) Sugars Proteins Lipids Vitamins Fiber Minerals A. insulation B. healthy levels significantly reduce the risk of…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_forwardCytokinins, which control root and shoot meristem activities, apical dominance, leaf senescence, root vs. shoot differentiation in tissue culture, are synthesized at transported through and A. root apical meristems, xylem B. shoot apical meristems, xylem C. root and shoot apical meristems, phloem D. young shoots and seeds, phloem and xylemarrow_forward
- When comparing vessel elements with sieve tube elements, only vessel elements…arrow_forwardThe electrochemical gradient is __________________. A. The total chemical potential gradient B. The total electrical potential gradient C. All the above Water and mineral nutrients are transported from root to shoot via __________________ A. Plasmodesmata B. Xylem C. Phloem D. Cell wallarrow_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_forward
- This is the location of the carbon fixation reactions in C4 plants. Select one: a. the leaf's spongy mesophyll b. none of these answers c. the leaf's bundle sheath cells d. the palisade mesophyll e. the nearest apical meristemarrow_forwardPhloem tends to flow downward because Select one: O a. the pressure in the leaves is usually lower than the pressure in the roots. O b. the pressure in the roots is usually higher than the pressure in the stems. O c. the pressure in the roots is the same as the pressure in the leaves. O d. the pressure in the roots is usually lower than the pressure in the leaves. a Ch 7 and 8 Written Response ssignment - Jan 26 Jump to... Chaarrow_forwardArrange the following four events in an order that explains the mass flow of materials in the phloem. 1)Water diffuses into the sieve tubes.2)Leaf cells produce sugar by photosynthesis.3)Sucrose is actively transported into sieve tubes.4)Sugar moves down the stem due to positive pressure. A. 1, 2, 3, 4 B. 2, 3, 1, 4 C. 4, 2, 1, 3 D. 2, 4, 1, 3arrow_forward
- The clinging of xylem sap to the xylem walls to prevent the sap from moving downward is due to Select one: O a. transpiration. O b. adhesion. concentration gradient. O d. cohesion. Chapter 9 and 12 Assignme xam Ch 7 and 8 Written Response Jump to... Assignment - Jan 26 C F5 F2 F3 F4 F6 F7 F8 F9 F10 11 #3 & 3.arrow_forwardWhich of the following statements is incorrect? a. Stomata open when K ions move out of guard cells. b. Tracheids but not usually xylem vessel elements are found in both gymnosperms and angiosperms. c. Loss of water is regulated by control of stomatal closure. d. Phloem sieve vessel function is supported by companion cells.arrow_forwardPlease complete the following question:arrow_forward
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