Simple plant cells may have only one or two chloroplasts in them.

简单细胞可能仅有一个或两个叶绿体。

Finally, let's look at the chloroplast.

最后是叶绿体。

Because this is how chloroplasts — the organelles that do photosynthesis in plant cells — evolved.

因为这就是叶绿体——细胞中行光合作用细胞——化过程。

Over time, that evolved into a chloroplast, the organelle that does photosynthesis.

随着时间推移，它们化成叶绿体，也就是行光合作用细胞。

Chloroplasts are found only in plant cells and contain chlorophyll.

叶绿体仅存于细胞内，而且含有叶绿素。

Today, every single plant has cells like this, full of chloroplasts and mitochondria.

今天，每一株都有这样细胞，充满叶绿体和线粒体。

Plant cells also contain chloroplasts which are filled with a chemical called chlorophyll.

细胞还包含叶绿体，里面充满了一种叫做叶绿素化学质。

But these first eukaryotic plants were soon consumed by other animals, which hijacked the precious chloroplast, just like Elysia.

但这些最早真核很快就被其他动吃掉了，并被劫持了珍贵叶绿体，就像绿叶海天牛一样。

It sucks the cell empty and digests most of its contents, but the chloroplasts remain intact.

它将细胞吸空，并消耗其大部分质，留下“叶绿体”完好无损。

Tripos is in turn eaten by other mixotrophic algae, providing frequent opportunity for exchange of organelles such as chloroplasts.

角藻又被其他混合营养藻类吞食，为叶绿体等细胞交换提供频繁机会。

This makes the chloroplasts able to sustain themselves for longer inside the slug.

这使得叶绿体能够鼻涕虫体内维持更长时间。

You won't find chloroplasts in animals — they're more of a plant thing. You wouldn't understand, Blobfish.

你动身上找不到叶绿体——它们更像是组成部分。你不会明白，水滴鱼。

Some of these tiny plants were not digested and lived on in the animal cells, eventually giving rise to chloroplasts.

这些微小并无法消化和吸收这些动细胞，最终形成了叶绿体。

And cyanobacteria became chloroplasts, the organelles that carry out photosynthesis today.

蓝藻变成了叶绿体，即今天行光合作用细胞。

Among these, the chloroplasts are our focus.

其中，叶绿体是我们重点。

As incredible as this adaptation is, there are more than 70 species of slug that steal chloroplasts from their food.

如此令人难以置信适应性，竟然有多达 70 多种鼻涕虫从食中窃取叶绿体。

We call this kleptoplasty." Klepto" , as in to steal, " plasty" as in chloroplast, right?

我们称这种 kleptoplasty 为“Klepto”，就像偷窃一样，“plasty”就像叶绿体中一样，对吧？

Chloroplasts need things that the algae provide to themthat animals shouldn't be able to do.

叶绿体需要藻类为它们提供动无法提供东西。

Within each chloroplast are molecules of chlorophyll, the pigment responsible for the lush green color of plants.

每个叶绿体内都有叶绿素分子，叶绿素是呈现茂盛绿色色素。

Taking a chloroplast and sticking inside of a cellis not enough to become photosynthetic.

获取叶绿体并粘细胞内部不足以行光合作用。