Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 36, Problem 5IQ
Summary Introduction
To explain: The meaning that plant faces a photosynthesis–transpiration compromise.
Introduction: Transpiration is the process in which the movement of water occurs by plants and its evaporation from aerial portions such as stem, leaves, and flowers. The process of photosynthesis is used by plants to convert sunlight into chemical energy. It can be used by plants to fuel its activity.
Summary Introduction
To explain: How the sunny, hot day with a dry wind can affect photosynthesis–compromise in a plant?
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Photosynthesis can be impacted by shifts in environmental conditions, most notably
by high light intensity and/or arid conditions. Plants employ a number of strategies
to deal with this. List two viable ALTERNATE pathways/mechanisms for
photosynthesis (beyond the traditional pathway) and the advantages/disadvantages
of each.
In hot, dry climates, plants have evolved mechanisms to avoid photorespiration. Which of the following is FALSE
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
a
b
с
d
e
C3 plants have no mechanism to avoid photorespiration
C4 plants reduce photorespiration by separating the light reaction in the mesophyll cells from the light-
independent reaction in the bundle-sheath cells
CAM plants minimize photorespiration by collecting and storing CO2 at night and keeping their stomata
closed during the day
C4 plants include corn, sugarcane, and many grasses
CAM plants can undergo photophosphorylation in the absence of sunlight
Open in Readir
Which of the following is TRUE about CAM photosynthetic pathway?
Compared to the C3 and C4 pathways, CAM photosynthesis results in greater transpiration and water loss.
O By separating where carbon is initially fixed inside the leaf tissue, CAM plants can better control the gradient of carbon dioxide between the air and their leaves.
CAM photosynthesis is more energy efficient than C3 photosynthesis.
Compared to C3 and C4 photosynthetic pathways, the rate of CAM photosynthesis is limited.
Chapter 36 Solutions
Study Guide for Campbell Biology
Ch. 36 - Prob. 1IQCh. 36 - a. A flaccid plant cell has a water potential of...Ch. 36 - Prob. 3IQCh. 36 - Prob. 4IQCh. 36 - Prob. 5IQCh. 36 - Prob. 6IQCh. 36 - Prob. 1SYKCh. 36 - Prob. 2SYKCh. 36 - If a plant has a phyllotaxy of alternate leaves...Ch. 36 - Prob. 2TYK
Ch. 36 - Prob. 3TYKCh. 36 - Prob. 4TYKCh. 36 - Prob. 5TYKCh. 36 - Prob. 6TYKCh. 36 - Prob. 7TYKCh. 36 - Prob. 8TYKCh. 36 - Prob. 9TYKCh. 36 - Prob. 10TYKCh. 36 - Prob. 11TYKCh. 36 - Prob. 12TYKCh. 36 - Prob. 13TYKCh. 36 - Prob. 14TYKCh. 36 - Prob. 15TYKCh. 36 - Your favorite houseplant is wilting. Which of the...Ch. 36 - Prob. 17TYKCh. 36 - Which of the following mechanisms explains the...Ch. 36 - Prob. 19TYKCh. 36 - Prob. 20TYK
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- What is the benefit of Photorespiration in plants and what problem does it pose in many plants?arrow_forwardIn hot, dry climates, plants have evolved mechanisms to avoid photorespiration. Which of the following is FALSE Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d C3 plants have no mechanism to avoid photorespiration C4 plants reduce photorespiration by separating the light reaction in the mesophyll cells from the light- independent reaction in the bundle-sheath cells CAM plants minimize photorespiration by collecting and storing CO2 at night and keeping their stomata closed during the day C4 plants include corn, sugarcane, and many grasses CAM plants can undergo photophosphorylation in the absence of sunlight 7 Open in Readinarrow_forwardWhat special adaptation has evolved in CAM plants such as cacti and stonecrops that allows CO2 fixation and the Calvin cycle to occur in the same cell, but still occur separately? Briefly describe how this separation of events works.arrow_forward
- Despite CAM photosynthesis having a comparatively higher water use efficiency relative to C3 and C4 plants, its distribution is restricted primarily to desert succulents. In terms of water use efficiency, explain why CAM photosynthesis has not spread more widely.arrow_forwardFor most plants, two distinct photosystems (Photosystem I and Photosystem II) work together in series during photosynthesis. These photosystems are complexes of proteins and pigment molecules. Statement 1: Photosystem I has an absorption maximum of 680 nm, whereas Photosystem II has an absorption maximum of 700 nm. Statement 2: The special pair of chlorophyll a molecules in the reaction center of photosystem I is designated as P700, whereas the special pair of chlorophyll a molecules in the reaction center of photosystem II is designated as P680. Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false.arrow_forwardIf a C3 plant that normally closes its stomata during hot, dry conditions were triggered to open them instead, the most likely outcome would be that O water leaves the leaf, decreasing the rate of photosynthesis O glucose leaves the leaf, increasing the rate of photosynthesis O CO₂ enters the leaf, decreasing the rate of photosynthesis O O₂ enters the leaf, increasing the rate of photosynthesis more chlorophyll is made, increasing the rate of photosynthesisarrow_forward
- For a given stomatal conductance, how will an increase in atmospheric concentrations of CO2 possibly influence the rate of photosynthesis? How might this affect the water use efficiency of the plant?arrow_forwardAmong the following combinations, which row is transpiration streams at respective cases? O Up the stem in the Across leaf via apoplast xylem patway mass flow osmosis Up the stem in the xylem osmosis Across leaf vla apoplast patway mass flow Up the stem in the Across leaf via apoplast xylem patway mass flow mass flow Up the stem in the Across leaf via apoplast xylem patway mass flow mass flow Out of leaf via stomata diffusion Out of leaf via stomata osmosis Out of leaf via stomata diffusion Out of leaf via stomata osmosis Into root Across root via symplast cells pathway diffusion osmosis Into root cells diffusion Into root cells osmosis Into root cells osmosis Across root via symplast pathway osmosis Across root via symplast pathway osmosis Across root via symplast pathway osmosisarrow_forwardWhich of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correctarrow_forward
- The image below shows a plant that has one stem wrapped in plastic. You can see the condensation of water on the inside of the plastic bag. Which of the following best explain the processes required for the bag to accrue 1 point condensation? Water from the root to the leaves via the xylem and transpiration from the stomata O Photosynthesis from the leaves via the stomata. O Cellular respiration through the stems. Cellular division within the dermal tissue.arrow_forwardusing a 14CO2 fixation assimilation method,a plant is found to be fixing carbon at a rate of 140mgh-1 .dm-2 leaf area in the sunlight. In darkness the same plant is losing 30mgh-1.dm-2 . Calculate the photosynthetic capacity of the plant and state with reasons to which photosynthetic type the plant belongsarrow_forwardCarbon fixation in plants is catalyzed by what enzyme? What is the name given to an organism (plant, bacteria or algae) that can produce its own food from organic molecules specifically by using photosynthesis? Which molecule leaves the Calvin cycle to be converted into glucose? What is the overall purpose of cellular respiration in photosynthetic organisms? In which plant organ does photosynthesis most commonly occur? Question options: the root the stem the leaf the flowerarrow_forward
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