The answer is "because water is produced as a by-product"...the word dehydration should also be a major clue because that means water loss.
4 cells will result. Each cell will have 20 Chromatids which is half a chromosome. once sexual reproduction takes place, these 20 chromatids will match with those from the other parent cell to form chromosomes
Mastication is just a fancy way to say chewing. Since nothing chemical is going on and the food is just being chewed, the answer is physical.
Oceanic crust is thinner and denser than continental crust.
