Question

Match the correct age in yeas with its major evolutionary event.

Answer 1

In the list of evolutionary events, we can see that their logical sequence is:

0. First prokaryotic cells evolved

,

1. Photosynthetic prokaryotes evolved, producing O2

,

2. First eukaryotic cells evolved

,

3. First multicellular life evolved

This means the options are in chronological order and we only need to order the age from oldest to the most recent one:

0. 3.5 billion years

,

1. 2.8 billion years

,

2. 2.1 billion years

,

3. 650 million years