Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 29, Problem 8TYU
SCIENTIFIC INQUIRY
INTERPRET THE DATA Ihe feather moss Pleurozium schreberi harbors species of symbiotic nitrogen-fixing bacteria. Scientists studying this moss in northern forests found that the percentage of the ground surface“covered” by the moss increased from about 5% in forests that burned 35 to 41 years ago to about 70% in forests that burned 170 or more years ago From mosses growing in these forests, they also obtained the following data on nitrogen fixation:
(a) Use the data to draw a line graph, with age on the x-axis and the nitrogen fixation rate on the y-axis.
(B) Along with the nitrogen added by nitrogen fixation, about 1kg of nitrogen per hectare per year is deposited into northern forests from the atmosphere as rain and small particles. Evaluate the extent to which Pleurozium affects nitrogen availability in northern forests of different ages.
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SCIENTIFIC INQUIRYINTERPRET THE DATA The feather moss Pleurozium schreberiharbors species of symbiotic nitrogen-fixing bacteria.Scientists studying this moss in northern forests found thatthe percentage of the ground surface “covered” by the mossincreased from about 5% in forests that burned 35 to 41 yearsago to about 70% in forests that burned 170 or more years ago.From mosses growing in these forests, they also obtained thefollowing data on nitrogen fixation:
Age(years after fire)
N fixation rate[kg N/(ha · yr)]
35
0.001
41
0.005
78
0.08
101
0.3
124
0.9
170
2.0
220
1.3
244
2.1
270
1.6
300
3.0
355
2.3
Inaquatic ecosystems, leaves with high lignin content decompose:a.rapidly because lignin is a nutrient-rich compound.b.rapidly because lignin enhances colonization by decomposing fungi.c.slowly because lignin reduces colonization by decomposing fungi.d.slowly because lignin is a carbon-poor compound.e.slowly because lignin-containing leaves sink rapidly.
The biological carbon pump is mainly driven by
large trees
small phytoplankton like coccolithophores and diatoms
herbivores
decomposers like fungi
soil microbes
Chapter 29 Solutions
Campbell Biology (10th Edition)
Ch. 29.1 - Why do researchers identify the charophytes rather...Ch. 29.1 - Identify four derived traits that distinguish...Ch. 29.1 - WHAT IF? What would the human life cycle be like...Ch. 29.1 - Prob. 4CCCh. 29.2 - Prob. 1CCCh. 29.2 - Give three examples of how structure fits function...Ch. 29.2 - MAKE CONNECTIONS Review the discussion of...Ch. 29.3 - List the key derived traits found in monilophytes...Ch. 29.3 - Prob. 2CCCh. 29.3 - Prob. 3CC
Ch. 29 - Draw a phylogenetic tree illustrating our current...Ch. 29 - Summarize the ecological importance of mosses.Ch. 29 - What trait(s) allowed vascular plants to grow...Ch. 29 - Three of the following are evidence that...Ch. 29 - Which of the following characteristics of plants...Ch. 29 - In plants, which of the following are produced by...Ch. 29 - Microphylls are found in which plant group? (A)...Ch. 29 - Suppose an efficient conducting system evolved in...Ch. 29 - Identify each of the following structures as...Ch. 29 - EVOLUTION CONNECTION DRAW IT Draw a phylogenetic...Ch. 29 - SCIENTIFIC INQUIRY INTERPRET THE DATA Ihe feather...Ch. 29 - WRITE ABOUT A THEME: INTERACTIONS Giant lycophyte...Ch. 29 - SYNTHESIZE YOUR KNOWLEDGE These stomata are from...
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