8.L.4.1
Biological Evolution
Sealey

Nerd Words
O Mass Extinction
O Analogous Structures
O Homologous Structures
O Vestigial Structures
O Natural Selection
O Genetic Variation
O Adaptation

Natural Selection
1
. Variation: There is Variation in Every
Population.
2. Competition: Organisms Compete for
limited resources.
3. Offspring: Organisms produce more
Offspring than can survive.
4. Genetics: Organisms pass Genetic traits on
to their offspring.
5. Natural Selection: Those organisms with
the Most Beneficial Traits are more likely to
Survive and Reproduce.
Natural Selection
The order is not that important. The fact that
all of the steps are intertwined IS important!

Competitio
n
genetics
Variation
Natural
Selection
Offspring

Who wants to live a million
years?
O http://science.discovery.com/games-and-
interactives/charles-darwin-game.htm
https://sites.google.com/a/jeffcoschools.us/
mr-volk-s-science-website/sciencecontent/inherited-change-natural-selection

Homology vs Analogy
O http://evolution.berkeley.edu/evolibrary/arti
cle/similarity_ms_01