The function of a vacuole is to store food or any other type of nutrients the cell might need to survive. This is true for both the plant and animal cell, though in the plant cell the vacuole's are much larger.
Answer:
Zygote is a answer to the question of
Well, I'm assuming you're talking about these terms...
Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
A good way to remember this is;
Does King Philip Come Over For Great Spaghetti
(However, this is in order from most specific to least specific)