Are there constants in life?

I was wondering as to whether there were any constants in Life per se... Let me see...

If there is Life, there must then be death... that is constant, even if you do not know when death would come.

There must be learning and adaptation in order for survival, even if the rate itself is unknown.

There will be cycles in a lifespan... childhood, adulthood, old age... if death does not come first.