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Evolution
Evidence for Evolution
Other Evidence for Evolution:
Adaptations – Camouflage, Mimicry
Fossils Anatomy Embryology Biochemistry – DNA Evidence
Example: Camouflage adaptations of mantids that live in different environments…
Structural adaptations have been observed in populations of birds, insects, and many other organisms.
Adaptations: Camouflage
Scorpion fish
Hi!Hi!
Adaptations: Mimicry
katydid moth caterpillar
Adaptations: Mimicry
monarch butterflyviceroy butterfly
Analyzing Fossil Evidence
Fossil: a trace of a long-dead organismBiological diversity: many different fossils
found showing different species or subspecies.
Episodic speciation: time when a large number of species appear
Mass extinction: brief periods in time where large numbers of species disappeared (Ex: dinosaurs)
Fossils
Elephant evolution Elephant evolution based on fossilsbased on fossils
The The fossil recordfossil record provides evidence provides evidence for the theory of evolution.for the theory of evolution.
Sedimentary Fossil Formation
Pair Share
In your own words, explain how mimicry is different from camouflage.
Anatomy:Forearm bones in mammals
Homologous structures: similar in similar in function and function and organisms organisms dodo share common share common origin.origin.
Homologous structures
Anatomy:• Analogous structures: similar in function, but organisms do not share a common origin.
Example: Insect wings and bird wings.
Anatomy:
Vestigial structures: body parts that have lost their function over time and are now useless.
Examples: human appendix
Embryology: Vertebrate embryos are similar, pointing to common origin.
Developmental homology
EmbryologyEmbryology
Biochemistry
Biochemistry: Similarities in DNA sequence and thus amino acid sequence point to a common origin.The fewer the differences, the more closely
related two organisms are.Cladogram: Visual way to show how
closely related species are.
Pair Share
Refer to the illustration. The bones labeled A are known as
a) vestigial structures.b) sequential
structures.c) homologous
structures.d) fossil structures.
Pair Share
Evidence for evolution includes all of the following except
a) some members of the same species show different traits.
b) similarities and differences in protein and DNA sequences between organisms.
c) the fossil record.
d) homologous structures
Pair Share
The occurrence of the same blood protein in a group of species provides evidence that these species
a. evolved in the same habitat.
b. evolved in different habitats.
c. descended from a common ancestor.
d. descended from different ancestors.