A few microbes that live in oxygen-poor environments seem to be on the way to losing their mitochondria entirely, and one group, oxymonad monocercomonoides, already has.

一些生活在贫氧环境中的微生物似乎正在走向完全失去他们的线粒体的路上，而类单鞭滴虫属的这些生物已经开始没有线粒体了。