【名师带你背单词】PTE高频内容精选《Twist in the tail of eukaryotic origins》part1,曼拓教育微信公众号文章

Dina老师

今天我们一起来看看这篇在PTE中听力考试中高频出现的生物类文章。

PTE练习题：Twist in the tail of eukaryotic origins

关键词： eukaryotic, mitochondria

Dina老师

下面带着对这些单词和短语的理解，尝试读一读下面的原文，看看是不是容易理解的多了呢？

Complex life may have had parasitic origins. New evidence suggests that the relatives of the mitochondria within our cells once had a tail, like many parasitic bacteria.

Life on Earth is packaged into three domains: the simple bacteria, the archaea, and the complex eukaryotes that make up most of the life we see with the naked eye.

The first eukaryotes appeared around 2 billion years ago. One popular theory suggests they did so after an immobile bacterium was ingested by an archaeon. The bacterium somehow escaped being digested and instead formed a symbiotic relationship with its consumer. As that relationship blossomed, the engulfed bacteria evolved into mitochondria – the energy producers in our cells.

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