BIOLOGY
4th Edition
ISBN: 9781266739606
Author: Hoefnagels
Publisher: MCG
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Question
Chapter 23, Problem 5MCQ
Summary Introduction
Introduction:
Stomata are the tiny pore structures found on the leaves of a plant. They are responsible for the gaseous exchange between the leaf and atmosphere. Stomata also play an important role during transpiration and prevent the excess water loss by their opening and closure.
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The formation of an air bubble in the xylem is called
a. agitation.
b. cohesion.
c. adhesion.
d. cavitation.
Stomata are usually opena. at night, when the plant requires a supply of oxygen.b. during the day, when the plant requires a supply of carbondioxide.c. day or night if there is excess water in the soil.d. during the day, when transpiration occurs.e. Both b and d are correct.
When absorption of water by the roots fails to keep up with the rate of transpiration, gain in turgor occurs, and the stomata close.
A. Agree, because the transpiration occurs faster than root absorption.
D. Disagree, because the condition should be when root absorption is able to keep up with transpiration, then stomates close.
B. Disagree, because under this condition, the turgor pressure decreases and the stomates close.
C. Agree, because increase in turgor pressure under this condition, closes the stomates.
Chapter 23 Solutions
BIOLOGY
Ch. 23.1 - Prob. 1MCCh. 23.1 - How do plants acquire C, H, O, N, and P?Ch. 23.1 - Prob. 3MCCh. 23.2 - Prob. 1MCCh. 23.2 - Prob. 2MCCh. 23.2 - Prob. 3MCCh. 23.3 - Prob. 1MCCh. 23.3 - Prob. 2MCCh. 23.3 - Prob. 3MCCh. 23.4 - Prob. 1MC
Ch. 23.4 - Prob. 2MCCh. 23.5 - Prob. 1MCCh. 23.5 - Prob. 2MCCh. 23.5 - Prob. 3MCCh. 23 - What is the difference between a macronutrient and...Ch. 23 - Prob. 2MCQCh. 23 - Prob. 3MCQCh. 23 - Prob. 4MCQCh. 23 - Prob. 5MCQCh. 23 - Prob. 6MCQCh. 23 - Prob. 7MCQCh. 23 - Prob. 8MCQCh. 23 - Explain the relationship between transpiration and...Ch. 23 - Prob. 2WIOCh. 23 - Prob. 3WIOCh. 23 - Prob. 4WIOCh. 23 - Prob. 5WIOCh. 23 - Prob. 6WIOCh. 23 - Prob. 7WIOCh. 23 - Prob. 8WIOCh. 23 - Prob. 9WIOCh. 23 - Prob. 10WIOCh. 23 - Prob. 11WIOCh. 23 - Prob. 12WIOCh. 23 - Prob. 13WIOCh. 23 - Prob. 14WIOCh. 23 - Prob. 15WIOCh. 23 - Prob. 1PITCh. 23 - Prob. 2PITCh. 23 - Prob. 3PIT
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- Guard cellsa. are found primarily on the upper surface of leaves.b. open their stomata by shrinking.c. lack chloropolasts.d. close in response to abscisic acid.arrow_forwardWhich of the following forces make the movement of water through the xylem possible? * A. Cohesion and adhesion B. Transpiration C. Root pressure D. A and B E. A, B, and Carrow_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_forward
- Plant bends towards the source of light on account of the movement of curvature known as: A. geotropism B. thigmotropism C. chemotropism D. phototropismarrow_forwardStomata can open and close in order to modulate the transpiration stream and allow for exchange of oxygen and CO2. Stomata OPEN by…arrow_forwardStomatal opening is induced by…arrow_forward
- 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_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_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
- The structure of the C4 leaf shows a. how mesophyll cells hug the epidermis of the leaf. hug the bundle sheath cells. b. C. they are spikey. how there are stomata on the underside of the leaf. they store water. TOU O b Oc O e darrow_forwardStomata can open and close in order to modulate the transpiration stream and allow for exchange of oxygen and CO2. Stomata OPEN by… Select one: a. Increasing their water potential (more +) through the uptake of K+ and Cl-. b. Guard cells losing water and becoming less turgid. c. None of the choices are true. d. Allowing for rapid movement of ions into the cell through plasmodesmata linking guard cells to neighboring cells. e. Recognizing environmental cues such as high CO2 within the leaf.arrow_forwardWhich of the following plant structures is necessary for transpiration to occur? a. Sieve tubes c. Fruits b. Leaves d. Rootsarrow_forward
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