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Unit 9 evolution
1.
The History of
Life on Earth and its driving force:
2.
3.
Some actual scientific
theories on the beginning of life on earth.
4.
5.
In 1658 Francisco
Redi’s experiment on flies disproves spontaneous generation.
6.
1862 Louis Pastuer’s
broth and bacteria experiment also disproves spontaneous generation.
7.
8.
Early earth was
a harsh environment. CO 2 ,N,SO 2 ,H 2 S,NH 3 ,CH 4
9.
10.
11.
12.
13.
14.
15.
16.
Loricifera.
17.
18.
19.
20.
21.
Father of modern
Geology Sir Charles Lyell (1797-1875) Explain his law of uniformitarianism to your table partner and provide an example?
22.
23.
Tree rings can
identify absolute dates based on their annual growth of tissues.
24.
25.
26.
Using relative and
absolute dating methods, paleontologists have created a geologic time scale from the layers of sedimentary rock.
27.
Relative Dating of
rock layers and fossils/environments: Which rocks and fossils are the oldest? Why?
28.
Geologic Time Scale
29.
As you examine
the geologic time scale note the key events, simple to complex progression of life, mass extinctions, and humans position relative to other life forms.
30.
31.
32.
Population: A group
of organisms of the same species within a given area.
33.
Six different points
of evidence for evolution
34.
35.
Fossil environments
36.
37.
38.
39.
40.
41.
Picture
42.
43.
Picture
44.
45.
3 week old
human embryo
46.
Yes, you looked
like this! Yikes! Human embryo 4.5 weeks
47.
Note tail and
gill slits in human embryo at 5 + weeks
48.
49.
50.
51.
Example of Lamark’s
idea of acquired characteristics in Giraffes
52.
1889 August Weisman
cut the tails off of hundreds of mice for 22 generations to disprove Lamark. OUCH!
53.
1844 Darwin and
Wallace formulated the theory of natural selection as the driving force for evolution.
54.
55.
Where do you
think most of the variation for a population originates?
56.
While it is
true that mutations account for variation most variations come from existing combinations of alleles. (remember them?)
57.
58.
59.
60.
61.
62.
63.
64.
Isolation forms new
species
65.
The Environment drives
the change.
66.
Divergent evolution: Isolated
populations evolve independently
67.
Adaptive Radiation:
Multiple branching of a family tree, new environments may have many available niches.
68.
Convergent Evolution: Different
Types of Organisms Evolve Similar Characteristics.
69.
Convergent evolution in
marine life
70.
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