Rebuttalofbiogeneticlaw

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Unformatted text preview: ebrate
Life
(6th
ed.).
 Pierre
Belon,
1555
 •  History
of
vertebrate
study
 •  Vertebrate
phylogeny
 •  Vertebrate
physiology
and
adaptation
 Biogenetic
Law
 •  Proposed
by
German
biologist
Ernst
Haekel
in
1866
 •  Stating
that
the
development
of
“advanced”
species
 goes
through
morphological
phases
that
look
like
 adults
of
less
advanced
species.
 Rebuttal
of
Biogenetic
Law
 • 
Drawings
are
highly
stylized
to
fit
his
hypothesis
 • 
Later
studies
suggest
otherwise
 Lamprey
 Ray
 Sturgeon
 A
 B
 C
 D
 E
 Pond
turtle
 Australian
Opossum
 Domestic
cat
 Adapted
from
Kardong,
K.
V.
(2006).
Vertebrates:
Comparative
anatomy,
function,
evolution
(4th
ed.).

 2
 11/2/09
 Evidence
of
relationship
from
embryonic
 development
 •  All
vertebrates
show
a
similar
architectural
 pattern
of
structural
and
development
 • 

Karl
Ernst
von
Baer ’s
Law
 (1828):
Features
common
to
 members
of
a
group
develop
 earlier
in
life
than
the
special
 features
that
distinguish
this
 group
from
other
groups
 Chordate
(contains
all
vertebrates)
body
plan
 Muscle
 segments
 Notochord
 Dorsal,
 hollow
 nerve
cord
 Mouth
 Muscular,
 post‐anal
tail
 Anus
 Pharyngeal
 slits
or
clefts
 
 F...
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