Natural Selection
Week 30-Life Science
What does it mean to evolve?
What does evolution mean?
Bird and bat wings are analogous — that is, they have separate evolutionary origins, but are superficially similar because they have both experienced natural selection that shaped them to play a key role in flight. Analogies are the result of convergent evolution.
Comparative Embryology
Comparative Embryology
Comparative Embryology
So how do new species form?
Species
A group of individuals that actually or potentially interbreed in nature.
What about hybrids…?
Think about what individuals would usually do…
“Speciation” is the event of creating a new species.
Rock Pocket Mice
Helpful, Harmful, or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Helpful, Harmful or Neutral?
Genetic Survivor Game
Tuskless Elephants
Winged Aphids
Bedbugs
Juncos