24.2

Question 1

miller-urey experiment

Answer 1

simulated conditons in earths early atmosphere to see if simple molecules and organic compounds, the building blocks of life, would form

Question 2

numerous hypotheses to explain emergence of metabolic pathways

Answer 2

primitive life-forms either constructed complex molecules from simple inorganic molecules (autotrophic) or acquired them directly from the environment (heterotrophic)

Question 3

developments enabling the advent of eukaryotes

Answer 3

-compartmentalization of cells
-evolution of endomembrane system
-endosymbiosis
-multicellularity
-sexual reproduction

Question 4

carbon fixation is an ancient process

Answer 4

living organisms alter the environment around them
incorporate C12 into their cells before other isotopes