It's not just plants...
A cell is part of your body, but is still it's own unique thing.
And it is conscious.
That's 30-40 trillion cells per person.
What matters is how big of a microtubule racetrack can be built to support higher consciousness. But even what we think of as human consciousness is just a middle manager summarizing and reacting to shit.
Most people just don't know shit about how any of it works because science spent 40+ years saying the smartest mathematician alive had a flawed premise. Since humans can't maintain the quantum superposition in laboratory setting, we insisted evolution couldnt figure out how to do it in a human body.
But we can, and we do.
And those microtubules that link up to create that race track where quantum superposition is possible, are in literally every living cell. They're the same thing that pulls DNA apart for replication, they're fucking everywhere, in every living cell.