Define mutualism in your own words.

Mutualism is a type of symbiotic relationship. It involves two organisms, in which both benefit in some way. For example, a common mutual relationship would be between a bee and a flower. The bee receives the sweet nectar to bring back to its hive while the flower is pollinated, which means seeds will be produced through time and process. Another example is humans and bacteria (the good kind). Some bacteria found inside humans aid in digestion so our food is properly broken down, which means we will be able to receive the nutrients. The bacteria gets energy from the food as well, so both organisms benefit in this scenario.

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a- all cells come from pre-existing cells