Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 1, Problem 13PIAT
Quantitative Researchers hypothesized that leaf mimicry by B. trifoliolata provides protection from plant-eating animals (herbivores). The results of a study of 45 individual vines are shown in the following graph. Light conditions were very similar in all cases. Researchers compared the level of leaf damage by plant eaters (herbivory index) in vines climbing leafy host trees, vines creeping on the ground with no support, and vines climbing on bare tree trunks. Use the P values provided to determine if the differences are significant or not (*** means P < 0.001, see BioSkills 3). What conclusion, if any, can be drawn about leaf mimicry from this study? What might the researchers do next to further explore the role of leaf mimicry?
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According to the video, what was the effect of artificially-modified ant density in acacias on the elephant feeding behavior? (Choose one.)
a. As the number of ants swarming increased per minute on acacia branches, so did the number of branches fed on by elephants.
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video link:
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You've been out in the field collecting data on the predation of holly leaves. You collect 200 leaves in total of which 100 leaves contain one mine, 20 leaves contain 2 mines and 30 leaves contain 3 mines. After close examination with your hand lens and dissecting microscope you categorize a total of 15 mines with round holes, 9 mines that were torn open and 27 mines with an irregular hole. After some basic analyses you conclude that the predation rates by blue tits and wasps are:
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forest sites than in forest fragments, whereas there were no significant differences
between fragments of different sizes. These results provide further evidence for the
effects of habitat size on the phorid-Acromyrmex system in a tropical rain forest,
based on the abundance of parasitoids both as adults in the field and as reared
immature phorids in the laboratory.
Phorid parasitized leafcutter ants were most abundant in areas of continuous
forest, and less abundant in the forest fragments.
O Phorid flies are important parasitoids of leafcutter ants
nd leafcutter ants can be found in Brazil's Southeastern
Both phorid flies
Atlantic Forest.
The study provides evidence that this parasitoid-host interaction between
phorid flies and leafcutter ant differs between continuous forest and forest
fragments.
Phorid flies were just as abundant in forest fragments as they were in
continuous forest, but were less successful in parasitizing leafcutter ants.
Chapter 1 Solutions
Biological Science (7th Edition)
Ch. 1 - Anton van Leeuwenhoek made an important...Ch. 1 - What does it mean to say that a characteristic is...Ch. 1 - 4. Could both the food competition hypothesis and...Ch. 1 - Prob. 5TYUCh. 1 - What did Linnaeus' system of naming organisms...Ch. 1 - 7. What is “selected” during natural selection?...Ch. 1 - 8. PROCESS OF SCIENCE Explain why researchers...Ch. 1 - Prob. 10TYPSSCh. 1 - Prob. 11PIATCh. 1 - Prob. 12PIAT
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