Transcript notes - BiG.NeT

Pop Quiz
1)A Change in a sequence of DNA is called
what?
2) Darwin called the ability of an organism
to survive and reproduce in its environment
what?
3) The change in allele frequencies in
genetic drift is due to what?
4) What separates populations in
Geographic Isolation?
AIM
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Turn in Homework
Go Over Wednesday’s Lab
Notes on Macroevolution
New Homework – Vocabulary Chapter
17 due Monday
Macroevolution
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Macroevolution is the large scale
evolutionary patterns that occur over
long periods of time. This includes:
Extinction, adaptive radiation,
convergent evolution, coevolution,
punctuated equilibrium, and changes in
developmental genes.
Figure 17-5 Geologic Time Scale
Section 17-1
Era
Period
(millions of
Time years ago)
Quaternary
1.8–present
Tertiary
65–1.8
Cretaceous
145–65
Jurassic
208–145
Triassic
245–208
Era
(millions of
Period
Time years ago)
Permian
290 – 245
Carboniferous
360–290
Devonian
410–360
Silurian
440–410
Ordovician
505–440
Cambrian
544–505
Era
(millions of
Period
Time years ago)
Vendian
650–544
Figure 17-5 Geologic Time Scale
Section 17-1
Era
Period
(millions of
Time years ago)
Quaternary
1.8–present
Tertiary
65–1.8
Cretaceous
145–65
Jurassic
208–145
Triassic
245–208
Era
(millions of
Period
Time years ago)
Permian
290 – 245
Carboniferous
360–290
Devonian
410–360
Silurian
440–410
Ordovician
505–440
Cambrian
544–505
Era
(millions of
Period
Time years ago)
Vendian
650–544
Figure 17-5 Geologic Time Scale
Section 17-1
Era
Period
(millions of
Time years ago)
Quaternary
1.8–present
Tertiary
65–1.8
Cretaceous
145–65
Jurassic
208–145
Triassic
245–208
Era
(millions of
Period
Time years ago)
Permian
290 – 245
Carboniferous
360–290
Devonian
410–360
Silurian
440–410
Ordovician
505–440
Cambrian
544–505
Era
(millions of
Period
Time years ago)
Vendian
650–544
Extinction – 99% of all species that
ever lived has become extinct
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Several times in Earth’s history mass
extinctions wiped out entire ecosystems.
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Did and asteroid wipe out all the
dinosaurs?
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What is the result of mass extinctions?
Adaptive Radiation
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When a species evolves into totally
distinct species.
Example:
Finches that Darwin Observed,
Dinosaurs evolved from reptiles.
AR can produce species that look alike
but aren’t related
Convergent Evolution
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The Process that makes unrelated
species resemble one another.
Example – similar shapes of sharks and
dolphins.
Coevolution
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Species interact in some way over long
periods of time – Example flowering
plants and the bees that pollinate them.
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Species evolve in response to changes
in each other over time.
Video 2
Evolution of Cells
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Click the image to play the video
segment.
Punctuated Equilibrium
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Long stable periods of fossil records are
interrupted by a burst of new species.
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Based on fossil record.
Often times rapid specie changes are
recorded in fossil record
Example Cambrian Explosion
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Developmental Genes and Body Plan
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Changes to the developing embryo
genes can result in big changes to the
organism.
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Example - Changes in the activation of
genes can make the difference between
having short legs and long legs
Macroevolution Review
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Macroevolution is the large scale
evolutionary patterns that occur over
long periods of time. This includes:
Extinction, adaptive radiation,
convergent evolution, coevolution,
punctuated equilibrium, and changes in
developmental genes.