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Chapter 22:Descent with Modification
Chapter 22 Campbell: Descent with modification: a Darwinian View of Life
19
Biology
11th Grade
03/20/2011

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Term
evolution
Definition
processes that have transformed life over time: change over time
Term
natural selection
Definition
populations of organisms can change over time as a result of individuals with certain heritable traits leaving more offspring that other individuals
Term
evolutionary adaptations
Definition
inherited characteristics that enhance an organism's ability to survive and reproduce in a particular environment
Term
natural theology
Definition
philosophy dedicated to finding the Creator's plan by studying nature
Term
taxonomy
Definition
naming and classifying forms of life; binomial nomenclature
Term
fossils
Definition
relics or impressions of organisms from the past
Term
sedimentary rock
Definition
rock formed from sand and mud that settles to the bottom of seas, lakes and marshes
Term
paleontology
Definition
study of fossils
Term
catastrophism
Definition
Cuvier~each boundary between strat corresponded in time to a catastrophe, such as a flood or drought, that had destroyed many of the species living there at the time
Term
gradualism
Definition
Hutton~ profound change is the cummulative product of slow, but continuous processes
Term
uniformitarianism
Definition
Lyell~ geological processes have not changed throughout Earth's history
Term
descent with modification
Definition
unity in life, with all organisms related through descent from some unknown prototypes that lived in the remote past
Term
artificial selection
Definition
breeding of domesticated plants and animals
Term
biogeography
Definition
geographical distribution of species
Term
homology
Definition
similarity in characteristics resulting from common ancestry
Term
homologous structures
Definition
structures that are constructed from the same structures, but have been modified over time to fit the function of the organism: ex: whale flipper and bat wing
Term
vestigial organs
Definition
structures of marginal importance to an organism: historical remnants of structures that had important functions in ancestors: whale hindlimbs
Term
ontogeny
Definition
development of an organism
Term
phylogeny
Definition
evolutionary history of the species
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