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Lecture 19

Lecture 19-notes

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Department
Biology
Course
Biology 1002B
Professor
Tom Haffie
Semester
Fall

Description
Lecture 19 Notes 481 ExtinctionExtinction is part of the process of evolution Species and lineages have been going extinct since life first appeared We should expect species to disappear at some low rate the background extinction rate as environments change poorly adapted organisms do not survive and reproduceThe fossil record indicates that extinction rates rose well above the ground rate at least five times in Earths history These events are referred to as mass extinctionsThe disappearance of the dinosaurs is one of the bestknown extinction events in earth history
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