chronological order

[DrDDSman]

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arrange in chrono order:

I- Protobionts
II-CH3, NH3, H20, H2
III-short poly peptides, simple sugars, nucleotides
IV-inorganic molecules


also, order these in chrono order:
I. Autotrophic anaerobes
II. Autotrophic aerobes
III. Heterotrophic anaerobes
IV. Heterotrophic aerobes

Thanks!

 

[UCB05]

arrange in chrono order:

I- Protobionts
II-CH3, NH3, H20, H2
III-short poly peptides, simple sugars, nucleotides
IV-inorganic molecules


also, order these in chrono order:
I. Autotrophic anaerobes
II. Autotrophic aerobes
III. Heterotrophic anaerobes
IV. Heterotrophic aerobes

Thanks!

Inorganic molecules (IV) form basic organic building blocks (II) which react to form more complex organic molecules (III) which over time aggregate into protobionts (I)

My reasoning for the second is that Heterotrophic anaerobes (III) formed in the reducing atmosphere of early earth until eventually those anaerobes evolved some autotrophic functions (I). Over time these autotrophs change the earth to an oxidizing atmosphere, favoring autotrophic and heterotrophic aerobes. My guess is that the autotrophs (II) come before the heterotrophs (IV), thinking about the explosion of land-based plant life, but it could be the other way around.