True or False [Origins of life]?

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andrew w

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Can I get a little help on things I'm getting confused with. It's either T or F and if it is F, then can you guys explain why?? Like change one word to make it true.

Heterotrophic prokaryotes evolved before autotrophic prokaryotes. (T or F)

Spontaneous generation occurs in microscopic organisms but not in visible organisms (T or F)

The proportions of gases in the atmosphere of Earth today are the same as they were 4 billion years ago. (I think it's false isn't it?)

Thanks
 
first one is false. If it weren't, then what would the first heterotrophs have eaten?

second one is true in theory (abiogenesis) but false if you mean by observation - because no spontaneous generation has ever been observed.

The third one is false due to billions of years of photosynthesis.
 
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