Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 37, Problem 4TYK
What evidence suggests that ABA from roots can signal guard cells to close?
a. If roots are given sufficient water, guard cells close anyway.
b. If roots are dry, guard cells begin to close—even though leaves may not be experiencing water stress.
c. Applying ABA on guard cells directly causes them to close.
d. If roots are dry, ABA concentrations in leaf cells drop dramatically.
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Which 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 C
In a comparison of the water potential and turgor pressure of leaf cells before and after wilting, which of the following would you expect to find?
Select one:
a. Water potential: wilted = not wilted; Turgor Pressure: wilted < not wilted
b. Water potential: wilted > not wilted; Turgor Pressure: wilted < not wilted
c. Water potential: wilted < not wilted; Turgor Pressure: wilted > not wilted
d. Water potential: wilted < not wilted; Turgor Pressure: wilted < not wilted
e. Water potential: wilted > not wilted; Turgor Pressure: wilted > not wilted
Cotton plants wilt within a few hours of flooding of their roots. The flooding leads to low-oxygen conditions, increases in cytosolic Ca2+ concentration, and decreases in cytosolic pH. Suggest a hypothesis to explain how flooding leads to wilting.
Chapter 37 Solutions
Biological Science (7th Edition)
Ch. 37 - Prob. 2TYKCh. 37 - Prob. 3TYKCh. 37 - 4. What evidence suggests that ABA from roots can...Ch. 37 - Why was it logical to predict that amyloplasts...Ch. 37 - Prob. 6TYUCh. 37 - To explore how hormones function, researchers have...Ch. 37 - Prob. 8TYUCh. 37 - Prob. 9TYPSSCh. 37 - Prob. 10TYPSSCh. 37 - Prob. 11PIAT
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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
- What 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 xylemarrow_forwardWhat happens when a stem is positively tropic to a certain stimulus? a. Auxins will respond by increasing the growth rate of the side facing that stimulus.b. The stem will respond by growing towards that stimulus.c. The stem will grow and bend away from that stimulus.d. The stem will respond by accumulating auxins in the side facingthat stimulus.arrow_forwardThe process of bulk flow transports fluids in a plant. What are the two main bulk flow processes? * A. Movement of water up the xylem and movement of solutes up and down the phloem B. Movement of water up the phloem and movement of solutes up and down the xylem C. Movement of water up and down the xylem and movement of solutes up the phloem D. Movement of solutes up the xylem and movement of water up and down the phloem E. Movement of solutes down the phloem and movement of water up and down the xylem F. Movement of solutes down the phloem and movement of water up the xylemarrow_forward
- Plants that have acclimated to drought stress are often more resistantto freezing stress as well. Suggest a reason whyarrow_forwardExperiments show that plants can communicate with each other. Consider a plant put under drought conditions which is connected via the roots to a neighboring plant. The drought plantbsends messages through the roots to its neighbor. Even through the neighbor plant has plenty of water, it will respond as if in drought conditions too. In what way will the plant respond?arrow_forward. Which of the following is not a typical plant response to oxygen deficit due to flooding? * A. Aerenchyma formation B. Hyponastic growth of submerged leaves C. Stomatal closure D. Induction of anaerobic stress proteinsarrow_forward
- Can you answer this question with both parts a. How does plant growth respond to gravity in stems vs. roots? b. How is gravitropism controlled during root growth?arrow_forwardWhich of the following is not an example of leaf adaptations against excessive heating? A. Small leaves B. Leaf rolling C. Reflective hairs D. Thin cuticlearrow_forwardIn response to high light intensity, which of the following is most likely expected in a shade plant on an anatomical level: Select one: a. decreased tocopherol content b. decreased vitamin C c. decreased starch d. decreased carotenoids e. leaves will reposition away from the sunarrow_forward
- UntouhedLeaves Describe what happened to the Mimosa leaf when touched. The picture on top shows a screenshot of the reaction of the plant leaf to touch presenting rapid response or nastic movement. Choose the correct statement that describes your result.. a. The leaf would rapidly move to clump together. b. Leaves moves as if it is being moved by wind. c. The plant dies since its hyper sensitive to touch. d. Leaf would bend to look it has been wiltedarrow_forwardWhich of the following statements about phototropism is/are not true? A. Red light is the most effective light wavelength for positive phototropism of plants. B. Higher auxin concentration on the lighted side causes that side to elongate more than the non illuminated side. C. Phototropins are the only effective light receptors in phototropism. D. Phototropism decreases the plant's ability to enhance photosynthetic capacity. E. All of the above F. None of the abovearrow_forwardPlant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. a) Describe the plant’s response to the presence of light. (refer to picture)arrow_forward
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