The root of mutualism, mutual means ?

Mutualism is defined as a relationship that benefits two organisms, or it is defined as a doctrine in sociology where mutual aid is beneficial to society and the individual. ... An example of mutualism is a mutual relationship such as co-ownership of property where both parties benefit.

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

d) center of the mid-ocean ridge

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