Because the water is pure, the water outside will follow the concentration gradient of osmosis (from high concentration to low concentration). Since the percentage of solutes is much lower (in fact it's not even there in pure water) and the water concentration is much higher, ergo it'll flow into the cell to balance out the concentration. This causes the cell to swell, and eventually burst, or lyse.
increase
It would lose salt into the water.
It dies.
Nothing. The onion will get wet.
Explain what would happen if a piece of seaweed from the ocean was placed in a fresh water aquarium?
die..and its body will float on the surface
Everything living would die.
There are certain types of perch that live in salt water, so in that case nothing would happen. However, if a fresh water perch was placed in salt water it would die. There are very few fish that can go between salt water and fresh water and perch is not one of them.
it cause it to swell
it would absorb more and more water until it will explode
Every living thing on the planet would die.
If the water lilly was placed in an area with permanent water. it would probably do fine. Without water, however, it would quickly die.