Background extinction is a measure of the ____.
A)rate of species turnover at the end of geological eras
B)number of species that suffer extinction at the beginning of geological eras
C)steady rate of species turnover within a lineage throughout most of their evolutionary history
D)lowest rate of species turnover within a lineage observed within a geological era
E)animals that appear in the dense forest

Question

Background extinction is a measure of the ____. ​
A)rate of species turnover at the end of geological eras
B)number of species that suffer extinction at the beginning of geological eras
C)steady rate of species turnover within a lineage throughout most of their evolutionary history
D)lowest rate of species turnover within a lineage observed within a geological era
E)animals that appear in the dense forest

Quizplus · Accepted Answer

Background extinction refers to the steady rate of species turnover within a lineage throughout most of their evolutionary history. It is the normal rate of extinction that occurs as part of natural selection and does not reflect any catastrophic events such as mass extinctions.

Background Extinction Is a Measure of the ____