Concept explainers
Introduction: Every species in an environment plays a crucial role in maintaining the balance of the environment and affects the existence of other dependent species. Some species are at the verge of nonexistence and they are called endangered species.
Answer to Problem 1TY
Correct answer: Endangered species is a species that is in danger of becoming extinct throughout all or a significant portion of its range. This statement best describes an endangered species. Hence, the correct answer is option d.
Explanation of Solution
Reason for correct answer:
Endangered species are the species that are at the verge of extinction from the whole world. If the species are not looked after or properly cared, then these species can seize to exist. This is not exactly limited to a particular portion of the species instead it is applicable to the complete range.
Option d. is given as “a species that is in danger of becoming extinct throughout all or a significant portion of its range”.
Endangered species are the species that are at the verge of extinction and the existence of these species is threatened to a significant or throughout all portion of its range. Hence, the correct answer is option d.
Reason for incorrect answer:
Option a. is given as “a species that is likely to become extinct in a portion of its range”.
Endangered species are likely to become extinct through all of its range and the threat of extinction is not limited to a small range. Hence, option a. is incorrect.
Option b. is given as “a species that has disappeared in a particular community but is present in other natural environments”.
A species is called endangered species if it has almost disappeared from the natural environment and not just from few communities. Hence, option b. is incorrect.
Option c. is given as “a species that is extinct”.
The endangered species are not completely extinct and can be saved if proper preventive measures are undertaken. Hence, option c. is incorrect.
Option e. is given as, “Both b and d are true of endangered species”.
Option d “a species that is in danger of becoming extinct throughout all or a significant portion of its range” is the correct explanation of endangered species. However, option b “species that have disappeared in a particular community but is present in other natural environments” does not explain endangered species. Hence, option e. is incorrect.
Hence, the options a., b., c. and e. are incorrect.
The given statement “endangered species is a species that is in danger of becoming extinct throughout all or a significant portion of its range” best describes an endangered species.
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Chapter 60 Solutions
Biology
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