The protocell moves. It encounters the food.

So we came up with this protocell model here that I'm showing.

Protocell A has a certain kind of chemistry inside that, when activated, the protocell starts to vibrate around, just dancing.

Protocell A has a certain kind of chemistry inside that, when activated, the protocell starts to vibrate around, just dancing.

It's a pool of water, and the protocell starts moving itself around in the system.

In this protocell model, it's just an oil droplet, but a chemical metabolism inside that allows this protocell to use energy to do something, to actually become dynamic, as we'll see here.

But if you saw this protocell, you would not confuse this with something that was actually alive.

The second protocell has a different chemistry inside, and when activated, the protocells all come together and they fuse into one big one.

As a result of meiosis, each spermatid contains only half of the genetic material present in the original primary spermatocyte.

It is moving around, exploring its environment, and remodeling its environment, as you see, by these chemical waves that are forming by the protocell.

In this protocell model, it's just an oil droplet, but a chemical metabolism inside that allows this protocell to use energy to do something, to actually become dynamic, as we'll see here.

The second protocell has a different chemistry inside, and when activated, the protocells all come together and they fuse into one big one. Right?

Align cell contents along the top of the cell

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Align cell contents along the bottom of the cell

The B cell will also take this guy into the cell.

It actually gives it that physical structure. If a cell were to move around that's going to have to be like an amoeba that's going to do with a cytoskeleton as well.

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This is the body of the neuron.

Why are they really really tiny?

Well the reason why is that the material inside a cell, the information inside the cell, like the DNA and the machinery of the cell, has to be able to fit inside the cell.

Set the content position vertically in the cell. Top means the content will be displayed on top of the cell. Middle means the content will be in the middle vertically in the cell. Bottom means the content of the cell will be displayed at the bottom of the cell.

They just hang out outside of the cell like this.

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