correct sequence in chronological order?

[egots]

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heterotrophic anaerobes, autotrophic anaerobes, autrotrophic aerobes, heterotrophic aerobes?

thanks

 

[Woodson36]

i think its auto anaerobes, then auto aerobes, then hetero anaerobes then hetero aerobes. i could be wrong

 

[yorkiepoo]

i think:

autotrophic anaerobes, heterotrophic anaerobes, autrotrophic aerobes, heterotrophic aerobes


this is just based on assumption because anaerobes are before aerobes and auto is before hetero... i might be wrong too

 

[BentalScholar]

heterotrophic anaerobes, autotrophic anaerobes, autrotrophic aerobes, heterotrophic aerobes?

thanks

I think you are correct in the sequence up there, based on the appearance of O2 in the atmosphere and other factors.
Photosynthesis did not occur untill the endosymbiont relation took place so autotrophs come in later on. Thus heterotrophic is first. Anaerobes bc there was no existance for O2 in the beginning. So Heterotrophic anaerobes first. Then came along chloroplasts and thus autotrophes, whether O2 was present or not, and so then since most microbes had no way to resist the toxicity of O2, that took time for an adaptation to take place. Thus 2) autotrophic anaerobes 3) autotrophic aerobes. That leaves 4) heterotrophs aerobes.
That is my explanation and that would be my choice.