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Chapter 22

BIL 160 Chapter Notes - Chapter 22: Phylogenetic Tree, Continental Drift, Biogeography


Department
Biology
Course Code
BIL 160
Professor
Daniel DiResta
Chapter
22

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!"#$%&'())(*(Descent with Modification: A Darwinian View of Life!
!
CONCEPT!22.3-!Evolution!is!supported!by!an!overwhelming!amount!of!scientific!evidence!
!
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MRSA strains are resistant to multiple antibiotics- probably because
bacteria can exchange genes with members of their own and other
species.
Natural selection is a process of editing, not a creative mechanism.
A drug does not create resistant pathogens; it selects for resistant
individuals that are already present in the population.
Natural selection depends on time and place. It favors those
characteristics in a genetically variable population that provide
advantage in the current, local environment.
!
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Evolutionary!tree-!#(73#2'#.(%"#%('&1/&6%5(&90/4%30,#'8('&/#%30,5"3$5(#.0,2(2'04$5(01(
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Homology-!53.3/#'3%8('&54/%3,2(1'0.(60..0,(#,6&5%'8@(A4%(,0%(,&6&55#'3/8(5#.&(
14,6%30,>(!
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Homologous!structures-!'&$'&5&,%(9#'3#%30,5(0,(#(5%'46%4'#/(%"&.&(%"#%(B#5($'&5&,%(
3,(%"&3'(60..0,(#,6&5%0'>(!
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Vestigial!structures-!'&.,#,%5(01(1&#%4'&5(%"#%(5&'9&7(#(14,6%30,(3,(%"&(0'2#,35.C5(
#,6&5%0'5>(!
!
Convergent!evolution-!%"&(3,7&$&,7&,%(&90/4%30,(01(53.3/#'(1&#%4'&5(3,(7311&'&,%(
/3,&#2&5>!
Species that share features because of convergent evolution is said
to be analogous- share similar function, but not common ancestry.
!
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53.3/#'(B#85(:convergent!evolution;>(!
!
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