Answer:
Root hair cells are alive and therefore need energy, which is why root hair cells contain many mitochondria in them. Root hair cells don't contain chloroplasts. Chloroplasts are used by the plant to make food using light energy. Since the roots aren't exposed to any form of light, they have no need for chloroplasts.
l think it is commensalism-lt is the relationship in which one organism benefits by the other is neither helped nor harmed
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Long answer short- to reproduce cells.
Spontaneous mutations in the bacterias DNA
