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.
The process by which a species becomes better suited to its environment is called adaptation. It occurs when natural selection acts on a heritable trait, or characteristic, that allows an individual to better survive in its environment.he process by which a species becomes better suited to its environment is called adaptation. It occurs when natural selection acts on a heritable trait, or characteristic, that allows an individual to better survive in its environment.