Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 34, Problem 13TYK
Discuss Concepts Concerns about global climate change and the greenhouse effect center on rising levels of greenhouse gases, including atmospheric carbon dioxide. Plants use CO for 2 photosynthesis, and laboratory studies suggest that increasedCO2 levels could cause a rise in photosynthetic activity. However, as one environmentalist noted, “What plants do in environmental chambers may not happen in nature, where there are many other interacting variables.” Strictly from the standpoint of physiological effects, what are some possible ramifications of a rapid doubling of atmospheric CO2 on plants in temperate environments? In arid environments?
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Suppose you are conducting an experiment, in which you selectively lower
the CO2 and O2 concentrations in the two experimental groups. The control
group reflects conditions of the current atmosphere. You grow C3, C4 and
CAM plants under these conditions and all other variables (soil, water, etc.)
are identical in all groups. Plants are regularly watered and grown at cool
temperatures. The table gives an overview of the treatment & control groups
and the types of plants grown. You don't yet have results on plant growth
(data cells are intentionally empty).
Plants
Treatment 1
Treatment 2
Control
CO2 = 0.01%,
O2 = 21%
CO2 = 0.04%,
O2= 30%
CO2 = 0.04%,
O2= 21%
CAM
C3
С4
In treatment 1, you expect
plants to have the highest rates of
photosynthesis and in treatment 2, you expect
plants to perform best.
Select one:
а. САМ;B Сз
b. САМ; САМ
с. Сд;B Сд
d. C3; САМ
е. Сд; Сз
f. C3; C3
For which kind of plant, and in which condition, would you expect to find leaves with the highest SLA (Specific Leaf Area)?
Selected Answer:
a shade-Intolerant plant growing in sun
Answers:
a shade-tolerant plant growing in shade
a shade-tolerant plant growing in sun
a shade-intolerant plant growing in sun
a shade-intolerant plant growing in shade
a. What is photosynthesis and what is its importance to plant growth and primary productivity?
b. What is the balanced equation for photosynthesis and how does it differ from cellular respiration?
c. What are the key components of the light and dark reactions and how do you differentiate one from the other?
d. How is photosynthesis measured?
e. What are the environmental influences on photosynthesis?
f. Include illustrations or figures appropriately.
g. List your major references (at least five and no more than 10 references)
Chapter 34 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 34.1 - Prob. 1SBCh. 34.1 - Prob. 2SBCh. 34.1 - Explain how the apoplastic, symplastic, and...Ch. 34.2 - Prob. 1SBCh. 34.2 - Prob. 2SBCh. 34.3 - Prob. 1SBCh. 34.3 - Prob. 2SBCh. 34.3 - Prob. 3SBCh. 34.4 - Prob. 1SBCh. 34.4 - Prob. 2SB
Ch. 34.5 - Compare and contrast translocation and...Ch. 34.5 - Prob. 2SBCh. 34 - Prob. 1TYKCh. 34 - Prob. 2TYKCh. 34 - Prob. 3TYKCh. 34 - Prob. 4TYKCh. 34 - Prob. 5TYKCh. 34 - Prob. 6TYKCh. 34 - Prob. 7TYKCh. 34 - Prob. 8TYKCh. 34 - An indoor gardener leaving for vacation completely...Ch. 34 - Prob. 10TYKCh. 34 - Prob. 11TYKCh. 34 - Prob. 12TYKCh. 34 - Discuss Concepts Concerns about global climate...Ch. 34 - Prob. 14TYKCh. 34 - Apply Evolutionary Thinking A variety of...Ch. 34 - Prob. 1ITDCh. 34 - Prob. 2ITDCh. 34 - Prob. 3ITD
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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_forwardScientific evidence indicates that the CO2CO2added to the air by the burning of wood and fossil fuels is contributing to global warming, a rise in global temperature. Tropical rain forests are estimated to be responsible for approximately 20% of global photosynthesis, yet the consumption of large amounts of CO2CO2 by living trees is thought to make little or no netcontribution to reduction of global warming. Explain why this might be the case. (HINT: What processes in both living and dead trees produce CO2CO2?)arrow_forwardNumber of oxygen bubbles/Min Number of oxygen bubbles/Min ++ +++> +++ +++> Number of oxygen bubbles/Min Number of oxygen bubbles/Min + + + ++> Sugar molecules dltiuseu Uut UI JUIU Which of the following graphs shows the effect of light intensity on the rate of photosynthesis in a pond weed (Elodea)? A 60 60 50 50 40 + 40 30 30 + 20 20 10 -> 하하 20 25 30 10 15 20 25 30 Distance from light source (cm) Distance from light source (cm) C 50 40 30 10 - 10 to ts 20 25 30 Distance from light source (cm) 10 25 30 Distance from light source (cm) Biology/5090/1 Z2010 [Tarrow_forward
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