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Evolution- Change in the POPULATION over time ((Adaptation (products of…
Evolution
- Change in the POPULATION over time
Evidence
DNA Sequences
How many chromosomes does a species have
How many similarities does two species strands of DNA have
Amino Acid Sequnece
What similar acids are present
Gene expression
Patterns in Fossil Records
Transitional form
show the intermediate states between an ancestral form and decadents
Relative Dating
comparing fossils ages to were they are found
Radioactive Dating
radioactive elements found in fossils or sediments around
Pattern of Anatomical Similarities
Homologous Structure
anatomical structures that share a common ancestry
Vestigial Structure
a structure in an organism that is reduced in size and function and that may have been complete and functional in the organism's ancestors
Analogous
separate evolutionary origins but have similar features.
Pattern of Embryological Similarities
Homologous similarity may only be visible in development
Some time this is the only similarity
Mechanisms
Genetic Drift
unlike natural selection, an advantageous is not necessarily being selected
Some individuals leave descendants by chance
Migration
AKA Gene Flow
Movement of Individuals and their genetic information from one population to another
Mutation
Random benefit value
Change in DNA
Natural Selection
occurs because their is variation, heredity, and the environment cannot sustain unlimited population growth
Types of Evolution
Macroevolution
major evolution change
Microevolution
evolution on a very small scale
Adaptation
products of natural selection
Common in a population because it provides an advantage
Charles Darwin
Formulates idea of Natural Selection
Known fro finding adaptions in finch species
Adaptive Radiation
Single species evolves into several species with minimal differences
Sexual Selection
is powerful enough to produce harmful qualities to the species existance
ability to successfully copulate with a mate
Artificial Selection
the selective breeding of organisms (by humans) for specific desirable characteristics
Co-evolution
a cases were two or more species effect each other eveolution
this happens a lot
Speciation
the formation of new species as a result of evolution