Microbiology When protozoa were evolved?
Hello, everyone! Do you know the era or time period, when protozoa were evolved?
The simplest organisms that had a nucleus appeared about 1.5 billion years ago. Living organisms without a nucleus appeared about 4 billion years ago. If we talk about a specific period, then there is no generally accepted division into periods.
@ekaterina-gribacheva Thanks a lot! Interesting, what's the oldest protozoa on the Earth now?)
It seems that in biology, the period of the appearance of protozoa is called Archean