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chapter 15
evoltuion
11
Biology
11th Grade
05/12/2010

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Term
derived traits
Definition
newly evolved features that do not appear in the fossils of common ancestors. (feathers)
Term
Ancestral Traits
Definition
more primitive features such as teeth and tails, that appear in ancestral forms
Term
Homologous structures
Definition
similar structures inherited from a common ancestor
Term
vestigial Structures
Definition
are the reduced or lesser forms of functional structures in another organism
Term
Analogous structures
Definition
used for the same purpose and superficially similar in construction but are not inherited from the a common ancestor
Term
embryo
Definition
pre-birth stage of an organism's developement
Term
biogeography
Definition
darwins study of the distribution of plants and animals around the world
Term
fitness
Definition
a measure of the relative contribution an individial trait makes to the next generation
Term
camouflage
Definition
adaptations that allow organisms to blend into their environments and hide from peditors
Term
mimicry
Definition
one species evolves to look like another more dangerous species
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