week 1 (1/23 &1/28)
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17 Terms
natural selection
process by which evolution can happen
requirements for natural selection
trait variation
heritability
differential survival
differential reproduction
trait variation
traits can be selected for/against
heritability
can be passed from parent to offspring
diff survival
difference in survival to reproductive age based on the trait
diff reproduction
have more breeding offspring
adaptations
a heritable trait that increases the fitness of individuals
evidence that species are related
geographic proximity
homology
homology
similar traits in separate species due to a common ancestor
evidence that species change over time
fossil record
vestigial traits
vestigial traits
structures in organisms commonly found in the species that serve no purpose
atavism
vestigial trait found in few individuals within a species
acquired characteristics
individuals change due to environmental pressures and pass on changed traits to offspring
Jean Baptiste Lamarck
1st formal evolutionary theory
acquired characteristics
contrivance
what the descendant has
exaptation
what the ancestor has
homoplasy
2 individuals have a trait in common that was not inherited from their most recent common ancestor