BILD 3 Lecture Notes - Lecture 16: Electric Spark, Cyan, Stromatolite
Document Summary
Heated and cooled water vapor, methane, ammonia, hydrogen, and electric spark and got aas: other people, other conditions: lots of other organic molecules, including. Highly reactive, and poisonous gas if not adapted to it. Have cytoskeletons to change shape: membrane-bound organelles create highly compartmentalized cell organized based on function. Endosymbiosis hypothesis: cell engulfed a bacterium and became its host. The shape of the tree of life: all living organisms have been evolving for the same amount of time. Multicellular organisms have not evolved more than prokaryotes, though they may look more complex. Simple does not equal less evolved: evolution not a ladder. Eldredge and gould 1972: ex: bryozoans, phyletic gradualism: new species arise by gradual change. Sudden changes are artifacts of the spotty fossil record. Traditional view (darwin: ex: horse evolution, both processes happen and are realistic ways to interpret fossil record. Paleozoic: 542 251 mya: cats often seize devilishly crafty prey: cambrian, ordovician, silurian, devonian,
