What is a variable?
A variable is a quantity that during a calculation is assumed to vary or be capable of varying in value.
What are cells?
A cell the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.
What is a noun?
A noun is a person, place, thing, or can sometimes be an idea!