Which of these terms refers to the red, green, and brown marine algae growing along seashores?

下面哪个术语是生长在海边红色、绿色和棕色海藻？

They’re common structures in some red and brown algae.

它们是些红藻和褐藻中常见结构。

And now, these scientists think they’ve found two species of multicellular red algae in some sedimentary rock from central India that dates back 1.6 billion years.

现在，这些科学家认为们在印度中部些沉积岩中发现了两种多细胞红藻， 其历史可以追溯到 16 亿年前。

But in a paper published this week in the journal PLOS Biology, researchers from the Swedish Museum of Natural History think that they found 1.6 billion year old red algae.

但在本周发表在 PLOS Biology 杂志篇论文中，瑞典自然历史博物馆研究人员认为们发现了 16 亿年前红藻。

Because of how big those cells are compared to the cells of other organisms, and some distinct structures inside those cells, they think it’s eukaryotic – specifically, a kind of red algae.

由于这些细胞与其生物体细胞相比有多大，以及这些细胞内部些不同结构， 们认为它是真核生物——具体来说， 是种红藻。

A paper published in 2000 identified one species of red algae from 1.2 billion year old fossils found in arctic Canada, which used to be the oldest eukaryote scientists were pretty sure of.

2000 年发表篇论文从加拿大北极地区发现 12 亿年前化石中鉴定出种红藻，这曾经是科学家们非常确定最古老真核生物。