keaton2980
Answered



About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because _____.


oxygen became available from cyanobacteria


banded iron formations developed


meteorite impacts increased


the atmosphere got thicker from volcanic outgassing

Verified Answer :

The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.

Related Questions