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Evolution in Action

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Evolution in Action Chapter 15 Section 3 Convergent Evolution Different species become more similar. Example #1: Birds and bats Example #2: Dolphins and sharks ... – PowerPoint PPT presentation

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Title: Evolution in Action


1
Evolution in Action
  • Chapter 15 Section 3

2
Convergent Evolution
  • Different species become more similar.
  • Example 1 Birds and bats
  • Example 2 Dolphins and sharks

3
Divergent Evolution (Adaptive Radiation)
  • Similar species become more different.
  • Example The kit fox and red fox
  • Example Lions and tigers
  • Example Turtles and tortoises

4
Convergent or Divergent Evolution?
Divergent Closely related species evolve in
different directions
5
Convergent or Divergent Evolution?
Convergent Unrelated species evolve similar
characteristics
6
Convergent or Divergent Evolution?
Divergent Closely related species evolve in
different directions
7
Convergent or Divergent Evolution?
Convergent Unrelated species evolve similar
characteristics
8
Artificial Selection
  • Humans select individuals with the traits they
    want
  • Then breed them to produce more individuals with
    those traits
  • Speeds up the process of divergent evolution

9
Coevolution
  • When two species influence each others evolution
  • Example Snails Crabs
  • Example Plants their pollinators
  • Example Shells of murex snails evolved to become
    thicker and spinier. In response, crabs that eat
    snails evolved more powerful claws strong enough
    to crack the snails shells.

10
Coevolution
  • Video
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