'2 bya' presentation slideshows

Origin of Life Hypotheses

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ASSEMBLY OF AN INFORMATION BEARING POLYMER:

ASSEMBLY OF AN INFORMATION BEARING POLYMER:. PROTEINS FIRST? Strong points: Easy to synthesize amino acids under a variety of conditions and polymers can also be formed. Even small peptides can exhibit catalytic activity. 20 amino acids provides for high information content. Weak points:

387 views • 28 slides

4.5 bya

4.5 bya. 3.5. 2.5. 1.5. 500 mya. 550 mya. 535 mya. 1.8 bya. 1.5 bya. 1.3 bya. 1.2 bya. 750 mya. 635 mya. 600 mya. 0.5 cm. 1 cm. 20 ?m. 20 ?m. 20 ?m. (b) Tappania , a 1.5-billion-year-old fossil that may represent an early alga or fungus. (e) Bonneia , a

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Nutrition

Nutrition. how organisms obtain energy and carbon to make organic compounds diverse in prokaryotes. Energy Sources. Light phototrophs Inorganic chemicals (eg. H 2 S, NH 3 , Fe 2+ ) chemotrophs Organic compounds chemotrophs. Carbon Sources. CO 2 autotroph (self feeder)

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Chapter 19/20

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Chapter 19/20

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Chapter 6: A Tour of the Cell

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Chapter 26

Chapter 26. Early Earth and The Origin of Life. Early history of life. Solar system~ 12 billion years ago (bya) Earth~ 4.5 bya Life~ 3.5 to 4.0 bya Prokaryotes~ 3.5 to 2.0 bya stromatolites Oxygen accumulation~ 2.7 bya photosynthetic cyanobacteria Eukaryotic life~ 2.1 bya

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Lecture #12 Date _______

Lecture #12 Date _______. Chapter 25 ~ Early Earth and The Origin of Life. You Must Knows. The age of the Earth and when prokaryotic and eukaryotic life emerged. Characteristics of the early planet and its atmosphere.

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The Origin of Life

Chapter 26: Early Earth and The Origin of Life: What were the conditions on Primordial earth? How did life begin on earth?. The Origin of Life. Spontaneous generation vs. biogenesis (Pasteur) The 4-stage Origin of life Hypothesis: 1- Abiotic synthesis of organic monomers

615 views • 7 slides