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Bio 175
test review
5
Biology
Undergraduate 2
05/08/2009
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Term
species
 Definition

 

a group of organisms that maintains a distinctive set of attributes in nature
Term
macroevolution
 Definition

1. evolutionary changes that creat new species and groups of species

2. occurs by accummulation of microevolutionary changes (changes in a single gene)
Term
known number of species?
 Definition
about 1.4 mil
Term
unidentified species range
 Definition
from 2 to 100 mil
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