Evolution in Action Chapter 15 Section 3. Convergent Evolution Different species become more...
-
Upload
edward-chambers -
Category
Documents
-
view
216 -
download
1
Transcript of Evolution in Action Chapter 15 Section 3. Convergent Evolution Different species become more...
Evolution in ActionEvolution in Action
Chapter 15 Section 3Chapter 15 Section 3
Convergent EvolutionConvergent Evolution Different species become more Different species become more
similar.similar. – Example #1: Birds and batsExample #1: Birds and bats– Example #2: Dolphins and sharksExample #2: Dolphins and sharks
Divergent Evolution (Divergent Evolution (Adaptive Adaptive RadiationRadiation))
Similar species become more Similar species become more different.different. – Example: The kit fox and red foxExample: The kit fox and red fox– Example: Lions and tigersExample: Lions and tigers– Example: Turtles and tortoisesExample: Turtles and tortoises
Convergent or Divergent Convergent or Divergent Evolution?Evolution?
DivergentClosely related species evolve in different
directions
Convergent or Divergent Convergent or Divergent Evolution?Evolution?
ConvergentUnrelated species evolve similar
characteristics
Convergent or Divergent Convergent or Divergent Evolution?Evolution?
DivergentClosely related species evolve in different
directions
Convergent or Divergent Convergent or Divergent Evolution?Evolution?
ConvergentUnrelated species evolve similar
characteristics
Humans select individuals with the traits they Humans select individuals with the traits they wantwant
Then breed them to produce more individuals Then breed them to produce more individuals with those traitswith those traits
Speeds up the process of divergent evolutionSpeeds up the process of divergent evolution
Artificial SelectionArtificial Selection
When two species When two species influence each other’s influence each other’s evolutionevolution– Example:Example: Snails & Crabs Snails & Crabs– Example:Example: Plants & their Plants & their
pollinatorspollinators
– Example:Example: Shells of murex Shells of murex snailssnails evolved to become thicker and evolved to become thicker and spinier. In response, spinier. In response, crabscrabs that that eat snails evolved more eat snails evolved more powerful claws strong enough powerful claws strong enough to crack the snails’ shells. to crack the snails’ shells.
CoevolutionCoevolution
VideoVideoCoevolutionCoevolution