Ultraviolet as ultraviolet light waves are around 420 nm like stated in the photo
The negative particles flow or are pushed along a path
Statement 2 is correct.
solids moving into solution is a physical change as the core structure of the molecules remain the same. evaporation of water and crystallization of salt are both physical changes as well.
The water does not change it's H2O chemical makeup because salt was dissolved into it.
Here is what Golgi looks like, so that you can look at the picture and describe it.
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Glad I could help, and good luck!
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