Download Evidence of Evolution

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• Embryology
Pg. 62
• Evidence of Evolution Pg. 63
Evidence of Evolution Pg. 63
1) Adaptations – traits that help an
organism survive.
Look at the picture above. What are
some adaptations of this bass?
2) Homologous structures =
Similar structures that can have
different functions.
• They tell us about the history of the
species. (common ancestor)
Salamander, Lizard, Turtle, and
Opossum
Salamander, Lizard, Turtle, and
Opossum
3) Analogous Structures =
Similar in function but are
different in structure.
( shows no common evolutionary
origin – ex bird and fly wings)
4) Vestigial structures =
No known function but
was probably useful to an
ancestor.
Examples of Vestigial Structures:
Appendix in a human.
Ear muscles.
Wisdom teeth.
Muscles to make hair stand up.
Human tailbone.
Eyes on blind cave fish.
5) DNA(Moleucular biology)similarity and differences.
• CAT
TAC
DNA is made of the same building blocks just
in a different order
–DNA in a human could be
• AATGGGCCC
• TTACCCGGG
–DNA in a tree could be
• AAGTTTAGC
• TTCAAATCG
6) Embryos-show how animals are
related by common ancestry, but
developed different structures.
– Earliest stage of growth and development in both plants
and animals
• Very similar embryo’s in Fish, Reptiles, Birds, and Mammals
7. Biogeography-Study of plants &
animals over Earth’s surface.
-Compares modern organisms to
the fossils found there.
8) Fossil Record-shows evolution