Biology: Life on Earth Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780134153742
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 28, Problem 3MC
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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 habitat
Predators that are keystone species can maintain species diversity in a community if theya) reduce the number of disruptions in the community.b) prey only on the least abundant species in the community.c) prey on the community's dominant species.d) competively exclude other predators
A keystone speciesa. is always a carnivore.b. has a minor influence on community structure.c. has a major influence on community structure out of proportion to its numbers.d. has a major influence on community structure only when present in large numbers.
Chapter 28 Solutions
Biology: Life on Earth Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
Ch. 28 - 1. The orderly progress of communities, starting...Ch. 28 - 2. Which of the following statements is not true...Ch. 28 - Prob. 3MCCh. 28 - Prob. 4MCCh. 28 - Prob. 5MCCh. 28 -
1. Organisms that interact serve as agents of...Ch. 28 - Prob. 2FTBCh. 28 -
3. The concept that no two species with identical...Ch. 28 - Prob. 4FTBCh. 28 -
5. Fill in the appropriate type of community...
Ch. 28 -
6. A somewhat predictable change in community...Ch. 28 - Define an ecological community, and describe the...Ch. 28 - Explain how resource partitioning is a logical...Ch. 28 - Describe examples of coevolution between consumers...Ch. 28 - Define succession. Which type of succession would...Ch. 28 - 5. Provide examples of two climax and two...Ch. 28 - Prob. 6RQCh. 28 - Prob. 7RQCh. 28 - Prob. 1ACCh. 28 - Prob. 2AC
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- When 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_forwardConverting a prairie to a farm field is an example of _________. a. overharvesting b. habitat loss c. exotic species d. climate changearrow_forwardDescribe the potential effects when a keystone species is removed from a community.arrow_forward
- The population size of a species capable of being supported by the environment is called its ________. a. limit b. carrying capacity c. biotic potential d. logistic growth patternarrow_forwardA limiting resource does all the following except that it (a) tends to restrict the ecological niche of a species (b) is in short supply relative to a species need for it (c) limits the presence of a species in a given community (d) results in an intermediate disturbance (e) may be limiting for only part of an organisms life cyclearrow_forwardPredators that are keystone species can maintain speciesdiversity in a community if they(A) competitively exclude other predators.(B) prey on the community’s dominant species.(C) reduce the number of disruptions in the community.(D) prey only on the least abundant species in the communityarrow_forward
- 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.arrow_forwardA keystone species is one whose removal from a community causes extinction of other species. How does this extinction happen?arrow_forwardDisturbance often affects community structure by __________________. Question 24 options: A) accelerating competitive exclusion B) temporarily decreasing the resource base, then increasing the resource base C) increasing the degree to which a resource is limited D) temporarily increasing the resource base, then decreasing the resource basearrow_forward
- What is a keystone species and why do these species play such an important role in their community structure? If a keystone species were to go extinct what would happen to their community? Once you have answered those questions give me an example of a keystone species.arrow_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_forwardAccording to the Enemy Release Hypothesis: a. Predators and pathogens experience population increase when invasive species become extinct b. Invasive species allow other species in the habitat to escape their normal enemies c. Predators and pathogens have significantly greater ability to invade other habitats than any other organisms d. Invasive species perform well in foreign habitats as they because not face their normal enemies e. Invasive species replace the native enemies of resident speciesarrow_forward
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