Transcript EVOLUTION IN ACTION

15-3 NOTES:
EVOLUTION IN
ACTION
PP. 308-311
EVOLUTION
DEFINED…
Evolution of a population is due
to environment and the
interaction of other species
ARTIFICIAL
SELECTION
humans breed for specific traits causing
differences in species (i.e. dog breeding)
TYPES OF EVOLUTION
Convergent evolution:
Organisms with very different
ancestors become more alike
due to a common
environment
(i.e fish and whales)compare analogous
structures
Ex: whale and fish, bird and insect
TYPES OF EVOLUTION
Divergent evolution: populations become
more and more dissimilar to adapt to the
environment
-compare homologous structures
Adaptive Radiation: Population undergoes
divergent evolution until it fills all areas of the
environment
• EX: Rough-skinned newt and garter snake
• Newt evolved to produce neurotoxins then the
snake evolved resistance to this toxin through
genetic mutations.
Birds and
flowers,
Humans and
bacteria are
other examples
COEVOLUTION
• When two
species each
evolve in
response to
each other over
a long period of
time.
• This leads to a
close
relationship
CLASSWORK
“Types of Evolution Tree Map”
Vocabulary 4-squares
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Convergent evolution
Divergent evolution
Artificial selection
Coevolution
Types of Evolution
Convergent
Evolution
Divergent
Evolution
Definition
Definition
Example
Example
4-SQUARE MODEL
Definition
Example
Picture
Word
Related Words (3)