1. The Dance of Evolution
Evolution - the change in life over time; descent with modification
theories…theories…theories…
Lamarck - species evolve by keeping traits that
their parents developed
Theory of Acquired Characteristics
Darwin - individuals with traits most favorable for a specific
environment survive and pass those traits
Theory of Natural Selection

2. Adaptation - any inherited characteristic of an
organism that helps it survive in its environment
Camouflage - an adaptation that enables an organism
to blend with it’s environment
Mimicry – resemblance of one species to another
Variation - the occurrence of an inherited trait that makes an individual different from other
members of the same species
Mutations - changes in an organism’s DNA

3. G…r….a……d….u….a…l...i….s….m - evolution is a slow gradual change
Models of Evolution
G…r….a……d….u….a…l...i….s….m - evolution is a slow
gradual change
Punctuated equilibrium - rapid evolution of a species
resulting from gene mutation
Evidence of Evolution
fossil record - observed remains of once-living organisms
vestigial structures - nonfunctional remains of organs that
were functional in ancestral species
homologous structures Body parts in different organisms that have
similar bones, muscles, blood vessels, nerves, embryological
development, but do not necessarily serve the same function
embryology - study of the development of the embryo
genetics - study of DNA

6. Give the numbers spotted versus not.
Compare the appearances of the moths that were spotted
with those that were not (originally).
Explain how camouflage enables an organism
to survive in its environment.