From around the mid 1990s, researchers discovered that is... governed... by the mitochondria. ...[T]he failure to commit apoptosis is the root cause … - Nick Lane

The is riddled with redundancy.

[W]e are biochemically quite simple in comparison bacteria. Simpler than bacteria. In terms of our metabolic biochemistry we are really limited. ...[W]e have ...across the entire domain of s, about the same degree of metabolic sophistication as a single bacterial cell.

I would define complexity, not really as genetic complexity because if you take it purely as genetic complexity, E. coli... a single cell may have 4,000 genes but the metagenome, the pool of genes in E. coli around the place may be on the order to 30,000 or more... [T]hat's the level of complexity equivalent to the human genome, or even more complex than the human genome, but it's organized and structured in a different way. ...You might say that it's structured in a similar way to an ... but I think an ant colony has taken that level of Eusocial behavior a long way beyond anything you would see in E. coli. So I would define it as morphologically complex, meaning cells are larger and have a lot of stuff in them.