Skip to content


Choose a Chapter below or view the Sitemap

Unit 1:
Ch. 1
Ch. 2
Ch. 3
Interlude A
Unit 2:
Ch. 4
Ch. 5
Ch. 6
Ch. 7
Ch. 8
Ch. 9
Interlude B
Unit 3:
Ch. 10
Ch. 11
Ch. 12
Ch. 13
Ch. 14
Ch. 15
Interlude C
Unit 4:
Ch. 16
Ch. 17
Ch. 18
Ch. 19
Interlude D
Unit 5:
Ch. 20
Ch. 21
Ch. 22
Ch. 23
Ch. 24
Ch. 25
Ch. 26
Ch. 27
Ch. 28
Ch. 29
Ch. 30
Interlude E
Unit 6:
Ch. 31
Ch. 32
Interlude F
Unit 7:
Ch. 33
Ch. 34
Ch. 35
Ch. 36
Ch. 37
Ch. 38
Interlude G

fiogf49gjkf0d
fiogf49gjkf0d
Cornell Finds Natural Selection in Humans
Nature, 20 Oct. 2005

The most detailed analysis to date of how humans differ from one another at the DNA level shows strong evidence that natural selection has shaped the recent evolution of our species.

» Read the full article

Active Reading Questions

  1. fiogf49gjkf0d
    fiogf49gjkf0d
    Many insects follow markings on flowers that are seen only under ultraviolet light. These markings lead the insects to nectar or pollen sources. The insects that follow the markings and the flowers that have the markings are said to have co-evolved. This means that they each have special ____________ that allow for their success.
    a) mates
    b) adaptations
    c) genetic drift
    d) homologous traits
  2. fiogf49gjkf0d
    fiogf49gjkf0d
    Humans and chimpanzees share 99% of their DNA. They also share many features that are derived from a common ancestor. Features derived from a common ancestor that make a line of organisms unique are said to be ____________.
    a) convergent
    b) divergent
    c) homologous
    d) adaptations
  3. fiogf49gjkf0d
    fiogf49gjkf0d
    Define natural selection. Explain what type of evidence for natural selection the authors of the article have found.
First Name:
Last Name:
Your Email Address:
Your Professor's Email Address:

Chapter Menu

Other Resources

Norton Gradebook

Instructors now have an easy way to collect students’ online quizzes with the Norton Gradebook without flooding their inboxes with e-mails.

Students can track their online quiz scores by setting up their own Student Gradebook.