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Bio 120 Chapter 1
Biology and the Tree of Life
25
Biology
Undergraduate 1
04/06/2011

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Term
organism
Definition
Any living entity that contains one or more cells.
Term
theory
Definition
A proposed explanation for a broad class of phenomena or observations.
Term
cell
Definition
A highly organized compartment bounded by a thin, flexible structure (plasma membrane) and containing concentrated chemicals in an aqueous (watery) solution. The basic structural and functional unit of all organisms.
Term
cell theory
Definition
The theory that all organisms are made of cells and that all cells come from preexisting cells.
Term
hypothesis
Definition
A proposed explanatio for a phenomenon or for a set of observations.
Term
prediction
Definition
A measurable or observable result of an experiment based on a particular hypothesis. A correct prediction provides support for the hypothesis.
Term
evolution
Definition
Term
natural selection
Definition
Term
heritable
Definition
Term
population
Definition
Term
artificial selection
Definition
Term
fitness
Definition
Term
adaptation
Definition
Term
speciation
Definition
Term
tree of life
Definition
Term
phylogeny
Definition
Term
eukaryotes
Definition
Term
prokaryotes
Definition
Term
taxonomy
Definition
Term
taxon (plural: taxa)
Definition
Term
phylum (plural: phyla)
Definition
Term
genus (plural: genera)
Definition
Term
scientific name
Definition
Term
null hypothesis
Definition
Term
control
Definition
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