Question

when did microbial cell first evolved on earth

Answer 1

Microbial cells are believed to have first evolved on Earth around 3.5 to 3.8 billion years ago. This period is known as the Archean Eon. The first microbial cells were likely simple single-celled organisms, such as bacteria or archaea, which inhabited the primordial oceans. These early microbial cells played a crucial role in shaping the early Earth's atmosphere and creating conditions suitable for the emergence of complex life forms.