1) Growth: A housecat grows, just like any living creature
2) metabolism: Like us human, housecats also have metabolism, which helps it maintain life
3) Reproduction: To continue to animal race of cats, they must be able to reproduce, or else they would go extinct
4) Cellular Organization: Each Cell must perform their duty, or else the cat would die
5) Homeostasis: Each cat must have an equilibrium, such as balance, balance of temperature of cat vs. the nature, etc.
6) Heredity: Each cat must inherit traits from it's ancestor that allows it to survive better in the earth
7) Response to stimuli: Each cat must be able to detect changes in the internal and external environment
hope this helps