Concept explainers
Introduction:
Biological diversity, biodiversity, is the variations in different species and the ecosystems in which these species survive. Biodiversity is studied in three stages, species diversity, genetic diversity, and ecosystem diversity.
Answer to Problem 1TY
Option (d), a species that is in danger of becoming extinct throughout all or a significant portion of its range.
Explanation of Solution
Explanation/justification for the correct answer:
Option (d), a species that is in danger of becoming extinct throughout all or a significant portion of its range. Endangered species are those species that are on the verge of extinction throughout the world. Hence, this option is correct.
Explanation/justification for the incorrect answer:
Option (a), a species that is likely to become extinct in a portion of its range. Endangered species are not the ones whose population is decreasing in the given range but in the whole world. Hence, this option is incorrect.
Option (b), a species that has disappeared in a particular community but is present in other natural environments. Endangered species are not the ones whose population is decreasing in the given range but in the whole world. Hence, this option is incorrect.
Option (c), a species that is extinct. Extinct species are those species whose even one organism is not present on this planet to continue life. While endangered species are those with a limited population. Hence, this option is incorrect.
Option (e) is both b and d. Among the given options, option d is correct. Hence, this option is incorrect.
Among the answers given, a correct answer is an option (d), a species that is in danger of becoming extinct throughout all or a significant portion of its range.
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Chapter 47 Solutions
Principles of Biology
- The Earth is currently experiencing the sixth mass extinction event. Conservation efforts attempt to identify and focus on the species most at risk of going extinct. Which characteristics make species more vulnerable to extinction? species that have a generalized diet species that have a small population size species that are not negatively affected by introduced species species that are used by humans for food and clothing species that have a long life spanarrow_forwardChoose the best answerarrow_forwardFigure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the following would likely occur? a. The carrying capacity of seals would decrease, as would the seal population. b. The carrying capacity of seals would decrease, but the seal population would remain the same. c. The number of seal deaths would increase, but the number of births would also increase, so the population size would remain the same. d. The carrying capacity of seals would remain the same, but the population of seals would decrease.arrow_forward
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- Which of the following statements is/are consistent with the Intermediate disturbance hypothesis? Species diversity is maximized in areas that experience high levels of disturbance Areas with low levels of disturbance will be dominated by K selected species Decades of suppression in California has likely increased diversity in our national forests Areas with intermediate levels of disturbance will have the lowest levels of diversityarrow_forwardFour of the following are characteristics that make some species especially vulnerable to ecological and biological extinction. Select the exception. O Low reproductive rates O Small territories Feeds at high trophic level O Narrow distribution Rarearrow_forwardHow does extirpation differ from extinction? Group of answer choices Extinction and extirpation are the same thing. Extirpation is the loss of a single population, while extinction is the loss of an entire species. Extinction only happens during a mass extinction. Extinction is the loss of a single population, while extirpation is the loss of an entire species.arrow_forward
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