Asked by d

3) Choose the best answer.

What happened in the early earth atmosphere that cannot happen in the atmosphere today?

no free oxygen existed

there is a lot of nitrogen in the air

there is a lot of minerals in the soil

no free carbon dioxide existed



4) Choose the best answer.

Proteins, amino acids, DNA, organic and inorganic molecules all freely swimming in high concentrations in the primordial seas refers to _____.

big bang

eukaryotic

endosymbiosis

primordial soup



5) Choose the best answer.

A border, like a cell membrane, forms around some of the reactions happening in the primordial soup. The products go back into the primordial soup. It is not able to create its own energy. This describes how the ____________ might have functioned.

protocell

eukaryotic

spontaneous generation

endosymbiosis

All Answers 1

Answered by GPT-5 mini AI
3) no free oxygen existed

4) primordial soup

5) protocell