My best choice for what controls what goes in and out of something would be generically called a gate. This would include liquids, electronics, and livestock.
Well basically the "control" group is the part of the procedure or experiment where the specimen or whatever your testing is separated from everything else and nothing is done to it, so you have something to compare your other results to.
Something that goes through the Atlantic ocean.
A control is something you cannot or will not change. A variable is something that can be changed or will be changing. Example: We cannot change our sex... either male or female. We cannot change the country where we were born.
If something such as a video goes viral online, it is spreading out all over the internet. Very popular, lots of views, etc.
Without controls it is not possible to make a hypothesis
the cell membrane controls what goes in and out the cell
the membrane
cell membrane
IT CONTROLS WHAT GOES IN AND OUT OF THE CELL
Membrane
Cell membrane
Please help!
It's the nuclear membrane.
cell membrane
amino
yes
When something goes wrong, it goes awry.