1. Label the Last Universal Common Ancestor on this tree. 2. Where on this tree would you find ancestors who might have experienced the Great Oxidation Event? 3. Where on this tree would you NOT find aerobic ancestors?

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Chapter1: The Human Body: An Orientation
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Names:
Answer the following questions by drawing on the provided tree:
1. Label the Last Universal Common Ancestor on this tree.
2. Where on this tree would you find ancestors who might have experienced the Great Oxidation Event?
3. Where on this tree would you NOT find aerobic ancestors?
4. Where on this tree would you find ancestors who were living in an atmosphere with 400 ppm of CO2
and 210,000 ppm of O,2Data on the next page)
5. Where on this tree would you find ancestors who were living in an atmosphere with 50,000 ppm of CO2
and 50,000 ppm of O2?
6. Where on this tree would you find ancestors who were living in an atmosphere with 400,000 ppm of
CO, and 0 ppm of O,?
Low-GC Gram-positives
High-GC Gram-positives
Hyperthermophilic bacteria
BACTERIA
Hadobacteria
Cyanobacteria
Spirochetes
Chlamydias
Proteo-
bacteria
LEUKARYA
All eukaryote phyla
Crenarchaeota
ARCHAEA
Euryarchaeota
Time
time, MYA
CO2, ppm
02, ppm
-3,000
400,000
-2,600
20,000
-2,400
10,000
1,000
-2,200
10,000
5,000
-2,000
30,000
20,000
-1,800
40,000
30,000
|-1,500
50,000
50,000
-1,300
25,000
75,000
-1,100
20,000
80,000
-900
10,000
70,000
-800
4,000
70,000
-700
1,000
50,000
-640
1,000
50,000
-540
10,000
150,000
-400
8,500
188,000
-380
7,000
200,000
-360
3,000
250.000
1,000
1,000
2,000
-330
320,000
-300
300,000
-250
250,000
-200
2,500
180.000
-150
3,000
180,000
-100
2,750
220,000
-65
2,500
210,000
-45
1,500
210,000
-25
1,000
210,000
-10
500
210,000
-1
275
210,000
400
210.000
Transcribed Image Text:Names: Answer the following questions by drawing on the provided tree: 1. Label the Last Universal Common Ancestor on this tree. 2. Where on this tree would you find ancestors who might have experienced the Great Oxidation Event? 3. Where on this tree would you NOT find aerobic ancestors? 4. Where on this tree would you find ancestors who were living in an atmosphere with 400 ppm of CO2 and 210,000 ppm of O,2Data on the next page) 5. Where on this tree would you find ancestors who were living in an atmosphere with 50,000 ppm of CO2 and 50,000 ppm of O2? 6. Where on this tree would you find ancestors who were living in an atmosphere with 400,000 ppm of CO, and 0 ppm of O,? Low-GC Gram-positives High-GC Gram-positives Hyperthermophilic bacteria BACTERIA Hadobacteria Cyanobacteria Spirochetes Chlamydias Proteo- bacteria LEUKARYA All eukaryote phyla Crenarchaeota ARCHAEA Euryarchaeota Time time, MYA CO2, ppm 02, ppm -3,000 400,000 -2,600 20,000 -2,400 10,000 1,000 -2,200 10,000 5,000 -2,000 30,000 20,000 -1,800 40,000 30,000 |-1,500 50,000 50,000 -1,300 25,000 75,000 -1,100 20,000 80,000 -900 10,000 70,000 -800 4,000 70,000 -700 1,000 50,000 -640 1,000 50,000 -540 10,000 150,000 -400 8,500 188,000 -380 7,000 200,000 -360 3,000 250.000 1,000 1,000 2,000 -330 320,000 -300 300,000 -250 250,000 -200 2,500 180.000 -150 3,000 180,000 -100 2,750 220,000 -65 2,500 210,000 -45 1,500 210,000 -25 1,000 210,000 -10 500 210,000 -1 275 210,000 400 210.000
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