Campbell Biology: Concepts & Connections Plus Mastering Biology with Pearson eText - Access Card Package (9th Edition)
9th Edition
ISBN: 9780134240688
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 32, Problem 7TYK
Summary Introduction
To determine:
If the plants transpire more when the light is more intense, and to determine the effect of temperature and humidity on the rate of transpiration
Introduction:
Transpiration is the passage of water through the plants through vascular bundles. Through transpiration, the rate of water uptake is regulated and the plant also cools down. The water is lost into the atmosphere through the stomatal opening when the tension of the cells rises.
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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
What is the relationship between light intensity and the rate of photosynthesis. Make a prediction about this relationship, and identify both independent and dependent variables in the prediction.
What will be a suitable hypothesis predict answers for the following: A) what is the rate of germinating peas versus non-germinating peas. B) what is the effect of temperature on germinating peas?
A) The concentration of CO2 is lower inside a plant cell than in the atmosphere (outside the cell). In your own words, describe how the CO2 levels are kept low inside the plant cell and explain why this is necessary. Assume stomata are open.
B) Regarding the situation presented in Part A and assuming that the stomata of the plant leaves are closed, would this favour the induction of photorespiration in a C3 plant? Explain. Make reference to relevant molecule or molecules as needed.
Please clearly label your responses as A and B
Chapter 32 Solutions
Campbell Biology: Concepts & Connections Plus Mastering Biology with Pearson eText - Access Card Package (9th Edition)
Ch. 32 - Fill in the blanks in this concept map to help you...Ch. 32 - Prob. 2TYKCh. 32 - Prob. 3TYKCh. 32 - By trapping insects, carnivorous plants obtain...Ch. 32 - Prob. 5TYKCh. 32 - Prob. 6TYKCh. 32 - Prob. 7TYKCh. 32 - Prob. 8TYKCh. 32 - Prob. 9TYKCh. 32 - Acid rain contains an excess of hydrogen ions...
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- A stoma (plural: stomata) is a tiny pore found on the underside of a leaf. When open, carbon dioxide can diffuse from the atmosphere, where it is present at approximately Catm= 0.70 mg/L, between the L = 5 μm thick guard cells, into the relatively well mixed air cavity within each stoma, and from the cavity into cells that consume it during photosynthesis. What is the mass flux of carbon dioxide into an open stoma that has a cross-sectional area of A = 2 μm2, a diffusion coefficient of D = 0.16 cm2/s, and a steady air cavity concentration of Cs = 0.04 mg/L?arrow_forwardExperiments to address the day-night discrepancy in warming (see Pic5) indicate that climate change has inhibited plant growth in warm dry areas more than in cool wet areas. Explain this observation.arrow_forwardHow would you expect the rate of transpiration to be affected by the following and why?: b. The sun rising over a CAM plant.arrow_forward
- Discuss other morphological differences between sunny and shady set-ups of mung bean in relation to phototropic response of plants. Characteristics sunny shaded Leaf color Lime Green Pale Green Direction of Growth Grows upward towards the direction of sunlight Oriented in the direction of the light but growth is bent downwardarrow_forwardDiagram 3: Light Wave Absorption of Chlorophyll a and b. Chlorophyll a Chlorophyll b 400 450 500 550 600 650 700 Wavelength (nm) Plant chlorophyll chemicals will absorb, or take in, light wave energy in order to produce their own organic molecules used for cellular energy. Reflected light refers to those wavelengths of light that will "bounce off" of the chlorophyll and not be absorbed. Select the conclusion that most accurately summarizes the data in diagram 3. Red and blue light waves have equal importance during photosynthesis. The majority of light energy is attained from red light, while the blue light waves provide additional light energy to photosynthesis. The majority of light energy is attained from blue light, while the red light waves provide additional light energy to photosynthesis. Medium length light waves are important to photosynthesis Absorptionarrow_forwardUnder what environmental conditions does photorespiration “outcompete" that of the CC? Specifically, what mechanism is responsible for committing the cell to photorespiration and what type of plant does not have any "safeguards" to ensure that the CC is performed rather than photorespiration?arrow_forward
- When considering the loading and unloading of photosynthate from the phloem, which of the following is FALSE? Select one: a. Apoplastic phloem unloading enables the import of sugars against their concentration gradient into sink tissue. b. In apoplastic loading, the solute potential of the companion cells is more negative than the apoplastic space nearby. c. In apoplastic loading, proton pumps create electrochemical gradients that can be used by symporter proteins to import sugars into the companion cell. d. All the statements are true. e. Symplastic loading relies on diffusion of the sugars through plasmodesmata from photosynthetic cells to the phloem cells.arrow_forwardHow would you expect the rate of transpiration to be affected by the following and why?: b. The sun rising over a CAM plant. Your answerarrow_forwardThe pathogenic fungus Fusicoccum amygdali secretes atoxin called fusicoccin that activates the plasma membrane proton pumps of plant cells and leads to uncontrolled water loss. Suggest a mechanism by which theactivation of proton pumps could lead to severe wilting.arrow_forward
- Plant roots are adapted as storage organ( such as potatoes and carrots)Typically photosynthesize during the summer and remain dormant underground during winter. Explain how sugar transport in such a plant would be different during summer, when the plant is photosynthesizing and in the spring when new growth is coming uparrow_forwardPrevious research shows that shade-adapted plants produce more chlorophyll than sun-adapted plants produce. Previous research also shows that sun-adapted plants produce more of the key enzymes that catalyzes photosynthesis and cellular respiration than shade-adapted plants produce. Describe which experiments support each of these previous research findings. Cite your results from Procedure II and Procedure III to support your reasoning.arrow_forwardDuring a La nifia event, the temperature of the Pacific Ocean near Central America becomes cooler than normal. As a result, more clouds form, and this can block sunlight from reaching plants in Central America forests. A researcher studying the effects of La nifia measured the amount of carbon dioxide ( CO,) uptake by tropical plants under different light intensities.The data are shown in the graph. Predict how a la nifia event effects the rate of photosynthesis by plants in the tropical forests of Central America. Provide evidence from the graph to support your prediction. Enter your answer in the box provided.arrow_forward
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