Walmart assistant managers average $45,000 a year, which is right on target for the national average salary, according to Glassdoor salary data. If you factor in bonuses and additional compensation, the average pay increases to $48, 311 a year.
Natural selection can only work on existing variation within a population. Such variations arise by mutation, a change in some part of the genetic code for a trait. Mutations arise by chance and without foresight for the potential advantage or disadvantage of the mutation.
Natural selection acts on the way organisms interact with one another and with their environment. The genes of organisms are not usually themselves involved in this intera â¦ ction: they direct it through intermediaries such as proteins. So natural selection must work through these intermediaries to affect genes.