Some samples are transparent, or very difficult to see, therefore, they are stained in order to be seen more clearly and easier to work with.
During eye surgery, the clear layer of the eye is stained to be easily extracted, if it was clear then the surgeon might cut the eye instead of just the layer.
Hope this helps, u might want to search online for more info.
Explanation:
no link. sorry I can't help
homeostasis is a set of self-regulation we can figure out what this means, One could be that we need homeostasis to maintain a balance, but if we receive any news it may affect homeostasis.
