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13 Cards in this Set
- Front
- Back
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What is biogenesis? |
All living things comes from living things. |
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What is spontaneous generation? |
An old belief that living thing could arise from non-living things. |
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What were some of the experiments to prove spontaneous generation wrong? |
Redi: Meat & Flies Spallanzi: broth boiled/bacteria Pasteur: Won a prize to clear up spontaneous generation |
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When did the sun approx. begin? |
5 billion years |
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When did the Earth approx. appear? |
4 billions years |
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What is radioactive decay? |
Decay of uranium isotopes in rock crystals that help us find the age of organisms. |
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What was Oparin's theory of the Origin of Life? |
- Atmosphere of Earth first contained ammonia, H2-, water vapor, & compounds of hydrogen and carbon. (Methane) |
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What did Oparin's theory say about amino acids & water? |
High temps. possibly made amino acids & the Earth cooled, water condensed, & formed lakes & seas. |
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For Oparin's theory, what does it say about oxygen & first cells? |
Very little oxygen existed, probably an anaerobic environment. First were probably prokaryotes, small, heterotrophs using organic molecules from environments. (Spontaneously formed.) |
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What are archeabacteria? |
Unicellular bacteria that live in harsh environments. Oxygen probably damaged the first unicellular organisms but a few oxygen bonded to some organisms to form aerobic organisms. |
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When was evidence of photosynthesis first predicted? |
3 billions years |
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When did eukaryotes show up? |
Possibly between 1.5 - 2 billions years ago. |
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Difference between ancient prokaryotes and eurkaryotes? |
Larger, DNA organized in chromosomes & membrane surrounded. |
