domains of life

What Are the 3 Domains of Life?

We categorize life into 3 domains of life: eukarya, archaea and bacteria. Domains classify life in the most general way such as the presence of a nucleus.

LUCA Last Universal Common Ancestor

LUCA: Last Universal Common Ancestor

All living things originated from a common ancestor called the last universal common ancestor (LUCA). The origin of life existed before LUCA (3.5 – 4.1 bya)