http://www.youtube.com/watch?v=V8KIvICfGEMhttp://www.youtube.com
/watch?v=V8KIvICfGEM
http://www.youtube.com/watch?v=UjMn4oHfYL4&i
ndex=44&list=PLFCE4D99C4124A27A
Some variants have
advantages over
others
• Those “better adapted” variants will survive in
greater numbers
Reproduction is
a function of
survival
• So the survivors will produce larger
numbers of offspring than those more
“poorly adapted”
Traits are
inherited
• Descendants will
resemble the survivors,
who were “well adapted”
http://www.youtube.com/watch?annotation_id=annotation_3856240253&feature=iv&src_vid=UuGrBhK2c7U&v=hOf
RN0KihOU#t=10shttp://www.youtube.com/watch?annotation_id=annotation_3856240253&feature=iv&src_vid=UuG
rBhK2c7U&v=hOfRN0KihOU#t=10s
http://www.youtube.com/watch?v=R6La6_kIr9g&index=3&list=PL
FCE4D99C4124A27A
http://www.youtube.com/watch?v=S7EhExhXOPQ&index=4&list=
PLFCE4D99C4124A27A
http://www.biologycorner.com/worksheets/pepperedmoth.html
Phyletic Gradualism
Punctuated Equilibrium
http://www.youtube.com/watch?v=rW54_vM9SF0
http://www.youtube.com/watch?v=tukxnJ8Gnbghttp://www.youtube.com/watch?v=tukx
nJ8Gnbg
http://www.youtube.com/watch?v=kPWDusnGgP8&feature=related
http://www.youtube.com/watch?v=_rHZCtwlhwhttp://www.youtube.com/watch?v=_rHZCtwl-hw
http://www.youtube.com/watch?v=LyRA807djLc
http://www.youtube.com/watch?v=v-Peboq0AqA
http://www.youtube.com/watch?v=Gm0uCPmB0Ng
http://www.youtube.com/watch?v=PP3HmDGs8G4&list=PLNtcr2FLR4dfstWMcH
25YEllfPbc3VmS3
http://www.youtube.com/watch?v=qV_TKi266bE
All of the
structures
shown
function for
flight, but
each is built
differently,
derived
from
different
tissues
http://www.youtube.com/watch?v=AGyuO7LaOco
http://www.youtube.com/watch?v=o81WIfjrt5I
http://www.youtube.com/watch?v=A9mbCNs47FI
http://www.youtube.com/watch?v=cQu4M--MRbc
Snakes have hips and leg bones,
but they don’t function for support
or movement
Modern humans have smaller jaws than
primitive humans, but have retained the
same number of molars. The “wisdom
teeth” are vestigial
The human coccyx is a vestigial tail
Whales have a vestigial pelvic girdle
https://www.youtube.com/watch
?v=zi8FfMBYCkk
A population consists of all the members of a species
that live and interact in the same period of time
• Evolution is not about changes within
individual organisms. It is about
changes within the species
• We generally think of species in terms
of their ability to interbreed
successfully
no mutations
• Mating
is random
no natural selection
population is statistically large
• Alleles do not enter or leave
“sexual selection”
“natural selection”
“genetic drift”
“gene flow”
• We will consider each of these in greater detail
average
range
selected for
selected
against
evolution that
results
The Biological Species concept works from the premise that members of the
same species can interbreed successfully and produce viable offspring (like the
Dog/Wolf hybrids shown above)
https://www.youtube.com/w
atch?v=vybfyhYK-m0
https://www.youtube.com/watch?v=-V53X9Gys18
https://www.youtube.com/watch?v=yccBO2468Po
https://www.youtube.com/watch?v=LLdC8nqPog&list=RDoYmzdvMoUUA&index=6
https://www.youtube.com/watch?v=pYzWmKlZtrU
https://www.youtube.com/watch?v=E6Fx3CaJhgk
https://www.youtube.com/watch?v=jTBHiZtnCsA
https://www.youtube.com/watch?v=mpTcu_h1xuE
https://www.youtube.com/watch?v=uGOMJqv8BOY
https://www.youtube.com/watch?v=lw773cr_jXk
Structural variations in reproductive organs prevent successful fertilization
The mule is a sterile hybrid of horses with donkeys
https://www.youtube.com/watch?v=_YpAG3miURY