I’m on that same question
Mutations can lead to missing or malformed proteins, and that can lead to disease. ... Some mutations happen during cell division, when DNA gets duplicated. Still other mutations are caused when DNA gets damaged by environmental factors, including UV radiation, chemicals, and viruses. Few mutations are bad for you.
The function of those tiny root hair cells is to speed up osmosis.
They absorb water and go from the roots to the rest of the plant.
The answer is continuous variation of phenotypic expression
I hope that helped
