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.
Explain how environmental factors can act as forces of natural selection? Explain why editing is better than creating as a metaphor for how natural selection acts on a population? Explain why natural selection does not act directly on genes? More questions Can you explain why natural selection acts on the phenotype rather than on the genotype of an organism?