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14 Cards in this Set
- Front
- Back
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1st genetic material
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probably RNA
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4 stage hypothesis for origin of life
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1.abiotic synthesis of organic monomers
2.abiotic synthesis of polymers 3.origin of self replicating molecules 4.formation of pre cells |
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abiotic synthesis of organic monomers
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early condition of earth was abiotic. experiments using atmospheric gasses, as well as meteors, or other things from outer-space.
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abiotic synthesis of polymers
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2. Abiotic synthesis of polymers- the monomers then formed polymers, then forming enzymes. when you put monomers on hot sand or clay, the heat will pull out the water, forming polymers.
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origin of self replicating molecules
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in order to be considered living it had to be able to self replicate
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formation of pre cells
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organic molecules that have been formed spontaneously coated in a cell membrane. Surface also had a voltage charge on the membrane.
-This pre-cell also had metabolism. |
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abiotic
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nonliving
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cell membrane made of
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lipids and proteins
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6 musts to being alive
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-reproduction
-homeostasis -metabolism -growth and development -organization -response to stimulus |
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synopsys of making a living cell
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- self replication + mutation leads to diversity
-varied success between different types of formed pre-cells ^ = form of natural selection + millions of years eventually it will lead to a cell. (Prokaryotic |
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evolution of first cell
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3.8 billion years ago
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chemoautotrophs
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chemically make their own food
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prokaryotes
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first carried out anaerobic reactions,
-lived for 2 billion years without the presence of anything else. -prokaryotes outnumber eukaryotes by far -bacteria -ancestor of archaea and Eukary |
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eukaryotes evolved...
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2.1 billion years ago
-are more efficient than prokaryotes -membranes were formed from invagination within the cell. As well as the organelles |
