Transcript Goal 3.05c: Evidence of Evolution Roots

Goal 3.05c:
Evidence of Evolution
Roots:
morph = shape
ology = study of
Ana = without
Homo = same
antidarwinism.com
Human footprints from early
man found at Laetoli by Dr. Mary
Leakey.
Fossils = preserved remains of an
organism that lived many years ago.
lboeckl.net
lovingthebigisland.wordpress.com
IDA: Revealing the Link
ngphotooftheday.blogspot.com
www.fossilmuseum.net
http://www.revealingthelink.com/more-about-ida/the-film
graphics8.nytimes.com
www.greenriverstone.com
images.icnetwork.co.uk
Comparative Morphology = study of the forms/shapes of organisms.
HOMOLOGOUS Structures = same shape but different functions.
Comparative Morphology = study of the forms/shapes of organisms.
ANALOGOUS Structures = different shape but used for same thing.
Convergent evolution =
evolution of similar solutions to similar
problems without being evolutionarily
connect.
3 groups with wings
– Does this mean
they have a
recent common
ancestor?
Flight evolved 3
separate times —
evolving similar
solutions to similar
“problems”
Convergent evolution led to mimicry
(harmless organisms having similar appearance to a harmful organism)
• Why do these pairs look so similar?
Monarch male
Viceroy male
poisonous
edible
Which is the moth
bee?
fly vs.vs.
thethe
bee?
fly
bee
moth
bee
Vestigial organs = organs that are still present but
are no longer useful.
• Hind leg bones on whale fossils
Why would whales have
pelvis & leg bones if they
were always sea
creatures?
Comparative embryology =
1
2
3
4
5
6
7
8
• Development of embryo tells an evolutionary
story
Human
Fish
Calf
Salamander
Hog
– similar
Tortoise
Rabbit
chicken
structures during development
Development of embryo tells an evolutionary story
Molecular record
• Comparing DNA & protein structure
– everyone uses the same genetic code!
• DNA
Human
Macaque
Dog Bird
Frog
32 45
67
Lamprey
 compare common genes
 compare common proteins
number of amino acids different
from human hemoglobin
8
125
0 10 20 30 40 50 60 70 80 90 100 110 120
DNA Fingerprints and Evolution
Who is more closely related to #1?
The closer the match for DNA fingerprints, the closer the
evolutionary relationship of the two organisms.
1
2
3
4
Evidence of Evolution
http://player.discoveryeducation.com/index.cfm?guidAssetId=AE274F5F-0937-430A-8762-D4BB56C72CBC&blnFromSearch=1&productcode=US