Answer:
you can search it up on google btw
It was also found that an increase in testosterone during the PASP predicted subsequent willingness to choose competitive tasks (3, 28, 29). ... Aggression research in human studies has revealed an interesting property of testosterone dynamics, its rapid fluctuations provoking reactive aggression in response to stimuli.
For a mutation to affect evolution it has to be passed on to all the offspring if that is what you mean.
