BIOLOGY:LIFE ON EARTH-W/ACCESS
11th Edition
ISBN: 9780134669076
Author: Audesirk
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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Which of the following statements about keystone species is false?
a) Keystone species are the most common (abundant) species in their ecosystem.
b) The reintroduction of wolves into Yellowstone Park increased biodiversity.
c) Removal of a keystone species can drastically change an ecosystem.
d) Keystone species have a much greater effect on the functioning of their ecosystems than other species.
When interspecific competition is weaker than intraspecific competition for both species A & B in the Lotka-Volterra competition model_________________.
a. species A wins
b. both species coexist
c. both species go extinct
d. species B wins
Why do moderate levels of disturbance result in an increase in community diversity?a) The resulting uniform habitat supports stability, which in turn supports diversity.b) Less-competitive species evolve strategies to compete with dominant species.c) Habitats are opened up for less competitive speciesd) Competively dominant species infrequently exclude less competitive species after a moderate disturbance.
Chapter 31 Solutions
BIOLOGY:LIFE ON EARTH-W/ACCESS
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- An ecologist studying several forest-dwelling, insect-eating bird species does not find any evidence of interspecific competition. The most likely explanation is (a) lack of a keystone species (b) low species richness (c) pronounced intraspecific competition (d) coevolution of predatorprey strategies (e) resource partitioningarrow_forwardThe presence of one species (A) in a community may benefit another species (B) if a. a commensalistic relationship exists between the two. b. The first species (A) preys on a predator of the second species (B). c. The first species (A) preys on a species that competes with a species that is eaten by the second species (B). d. All of the choices are correct.arrow_forwardIf you were to experimentally remove the snake from the community in the diagram below, and you found that frogs dramatically increased in number while most of the other species declined in number then you could conclude that the snake is..? PICTURE ATTACHED A. an introduced species B. a parasite C. keystone species D. co-evolved with the raccoon E. an example of bottom up controlarrow_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_forwardThe Burmese Python, an invasive species, has been introduced to the Florida Everglades, largely through release by owners who acquired the snakes from exotic pet traders. Though the Everglades are protected, pythons as predators can not be easily controlled. What can be concluded about the effect of the python population on the biodiversity of the Everglades? A. Since the Everglades are protected, python control is limited under laws that protect species in the Everglades. B. Since the python population is growing, it will eventually become a native species and will increase biodiversity. C. Since pythons prey on many species in the Everglades, resources will be more available for surviving species and fewer will be considered endangered. D. Since pythons have no predators, they are responsible for decreasing mammal population and are a greater threat to biodiversity.arrow_forwardWhich 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_forward
- 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.arrow_forwardA keystone species is one whose removal from a community causes extinction of other species. How does this extinction happen?arrow_forwardIn your region, what species are threatened with extinction? Why are they vulnerable? Suggest steps that could be taken to increase their populations.arrow_forward
- The total number of species present in a community is called the a. species evenness. b. species richness. c. species-area relationship. d. population.arrow_forwardCarrying capacity is defined as a species’ average population size in an environment. Which of the following resulted to exceeding carrying capacity in a particular environment? a. increasing birthrates, decreasing deathrates, increasing immigration and no emigration takes place b. increasing birthrates, decreasing deathrates, decreasing immigration and no emigration takes place c. increasing birthrates, decreasing deathrates, decreasing immigration and increasing emigration d. decreasing birthrates, increasing deathrates, increasing immigration and increasing emigrationarrow_forwardA frog population lives in a pond covered with a species of aquatic plant that attracts insects due to its color. The small frogs depend on the insects for This represents a _______ relationship between the frog and the plant species. a) predation b) mutualistic c)competitive d)commensalismarrow_forward
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