BIO 1140 Chapter 2.3-3.5: Lecture 2 Reading Notes
Document Summary
Typical plant cell: cell wall, very large vacuole (full of fluid (nutrients, wastes, and water)), chloroplasts, tonoplast (maintains plant cell shape and controls pressure in the cell, different from plant cell) Premordial atmosphere contained water vapour, hydrogen, methane, co2, ammonia, nearly complete absence of oxygen. These molecules have lots of electrons and protons and so reacted with each other to produce larger and more complex organic molecules --- created a reduced atmosphere (oparin-haldane) This hypothesis suggests that the macromolecules formed in the atmosphere. Today"s atmosphere is relatively oxygen rich and since oxygen is a good oxidizing agent, -- oxidizing atmosphere, presence of high levels of o2 = o2 accepts electrons from organic molecules to produce water = complex molecules can"t form in the atmosphere. Atmosphere in one part of the vessel and then the gas mixture cools and condensation occurs at another end of the vessel back into the water, experiment ran for a week and.