Why do cells have a plasma membrane?

to separate proteins from the nucleus

to distinguish plants from animals

to define the size of the cell

to separate the inside of the cell from its environment

To separate the inside of the cell from its environment.

The cell membrane is primarily made up of lipids and proteins. It provides protection to the cell by keeping the interior of the cell separated from its external environment.  

It is a selectively permeable membrane meaning that it only allows certain substances to pass through it. It is involved in various cellular processes like cell signaling, cell adhesion, endocytosis, exocytosis etc.

Creeper, oh man

So we back in the mine, got our pick axe swinging from side to side,

Side, side to side

This task a grueling one,

Hope to find some diamonds tonight, night, night

Diamonds tonight

Heads up, you hear a sound,

Turn around and look up, total shock fills your body,

Oh no it's you again,

I could never forget those eyes, eyes, eyes,

Eyes, eyes, eyes

'Cause baby tonight,

The creeper's trying to steal all our stuff again,

'Cause baby tonight, you grab your pick, shovel and bolt again,

And run, run until it's done, done,

Until the sun comes up in the morn'

'Cause baby tonight, the creeper's trying to steal all our stuff again

Just when you think you're safe,

Overhear some hissing from right behind,

Right, right behind

That's a nice life you have,

Shame…

Explanation: