Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134168296
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 31, Problem 2MC
Summary Introduction
Introduction:
An ecosystem is made up of different kinds of species. Each species play an important role in the ecosystem. Thus, the species-ecosystem interaction is an interdependent association, which is essential for the survival of both of them. Despite this fact, there are a few species who hold more importance than the rest of them.
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The relative abundance of any one species within a community of many species is known as
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species evenness.
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c.
specialization.
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The total number of species present in a community is called the
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species evenness.
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species richness.
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species-area relationship.
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According to the competitive exclusion principle,a. one species is always more competitive than another for a particular food source.b. competition excludes multiple species from using the same food source.c. no two species can occupy the same niche at the same time.d. competition limits the reproductive capacity of species.
Chapter 31 Solutions
Biology: Life on Earth (11th Edition)
Ch. 31 - A factor that increases humanity's ecological...Ch. 31 - Prob. 2MCCh. 31 - Prob. 3MCCh. 31 - Prob. 4MCCh. 31 - Which of the following is not true of a population...Ch. 31 - Prob. 1FTBCh. 31 -
2. Products or processes by which functioning...Ch. 31 - Many of the benefits that humans derive from...Ch. 31 - Prob. 4FTBCh. 31 -
5. The smallest population of a species that is...
Ch. 31 -
6. A Native American saying tells us that “We do...Ch. 31 - Prob. 1RQCh. 31 - What is ecological economics? Why is it important?Ch. 31 - Prob. 3RQCh. 31 -
4. What five specific threats to biodiversity are...Ch. 31 - Why are efforts to protect monarch butterflies a...Ch. 31 - List some reasons that the ecological footprints...Ch. 31 -
2. Search for and describe some examples of...
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- Which of the following defines the role of a species in a community,including its habitat and interaction with other species?a. ecological niche d. mimicryb. competitive exclusion e. None of these are correct.c. competition levelarrow_forwardWhy does the aquarium trade contribute to the introduction of nonnative species? a. Exotic species can escape or be released into local ecosystems. b. Aquarium owners do not always understand how ecosystems interact. c. Nonnative fish are shipped worldwide for aquariums. d. All of the above Please select the best answer from the choices provided A B C Darrow_forwardA species that has an immediate threat to extinction is said to be:a. threatened. c. alien.b. endangered. d. extinct.arrow_forward
- Which of the following best describes a keystone species? a. An organism, whose introduction causes or is likely to cause environmental harm b. An organism, who if removed, the entire ecosystem changes. c. Can signal a change in the biological condition of a particular ecosystem and diagnose the health of that ecosystem d. Can indirectly protect several other species in the same habitatarrow_forwardWhich of the following is not true of a population of largepredators in a small reserve?a. The species may disappear from the reserve.b. The species will probably undergo a populationexplosion.c. The species will probably lose genetic diversity.d. The species may overeat its prey, causing a reduction inprey population.arrow_forwardA group of individuals of the same species within the same ecosystem is known as a community. b. population. c. colony. d. cohort.arrow_forward
- a black bear accidentally stepped on a ladybug beetle, and the beetle survived. What type of ecological species interaction is this? a. amensalism b. commensalism c. neutral d. it is not a species interaction, because this incident does not affect the fitness of bears or ladybug populations e. the answer depends on whether that ladybug's fitness is affected negativelyarrow_forwardIf you are studying the changes in the panda population in Asia you are most likely considered a…. a. Population ecologist b. Ecosystem ecologist c. Global Ecologist d. Community ecologistarrow_forwardWhen an invasive species alters the community structure it is introduced to, what can the consequence be? a. extinction of economically important species b. reduced predation on some native species c. increased predation on some native species d. all of the abovearrow_forward
- Which of the following is the definition for species richness? A. The number of species in a community. B. The relative abundance and species richness in a community. C. The number of dominant species in a community. D. The proportion of a given species in the community.arrow_forwardWhen songbird species that nest in forest core areas are exposed to habitat fragmentation and more forest edge, they can become exposed to: A. increased predation of their eggs by raccoons B. increasingly dry micro-climate conditions C. brood or nest parasitism by brown-headed cowbirds D. All of the above are correct E. none of the above are correctarrow_forwardWhich of the following statements is correct regarding the competitive exclusion concept? a. multiple species can’t share the exact same niche within a community b. the realized niche of a species is different from its fundamental niche. c. competition within a population results in the success of the best-adapted individuals. d. two species cannot coexist within the same habitat.arrow_forward
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