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IB Biology Evolution
Key Vocabulary
20
Biology
12th Grade
05/23/2011

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Term
Aristotle
Definition
Greek who believed that species were fixed and didn’t evolve
Term
Buffon
Definition
1750s, French naturalist, suggested earth was more than 6000 years old
Term
Lamarck
Definition
1800s, French naturalist, evolution explains life’s diversity
Term
Darwin
Definition
1859, author of Origin of Life and “father of evolution”
Term
Galapagos
Definition
marine iguanas’ home, on equator west of South America, famous for Darwin’s research
Term
modern synthesis
Definition
1940s, comprehensive theory of evolution with genetics added
Term
microevolution
Definition
small scale changes in gene pool over a number of generations
Term
species
Definition
population of individuals that have successful breeding potential
Term
biogeography
Definition
geographical distribution of species
Term
population
Definition
group of individuals of same species, in same place and time
Term
population genetics
Definition
1920s, science that studies genetic change in groups of individuals
Term
gene pool
Definition
total collection of genes in a population at any one time
Term
genetic drift
Definition
change in gene pool of a population due to chance
Term
mutation
Definition
a change in an organism’s DNA that creates a new allele
Term
gene flow
Definition
allele changes in a population by movement of individuals
Term
artificial selection
Definition
selective breeding of domesticated plants and animals
Term
fossil record
Definition
strongest evidence of evolution, order/age in rock layers
Term
natural selection
Definition
differential reproduction, basic mechanism of evolution
Term
fitness
Definition
relative contribution to gene pool an individual makes
Term
homologous structures
Definition
structures that are similar because of a common ancestry
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