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.
http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/bio%20101/Bio%20101%20Lectures/Natural%2 0Selection/natural.htm Read the first 3 sections (stop when you get to variation). 12. Does natural selection act on individuals or does it act on something else? Explain this. 13. What are the 4 reasons that natural selection occurs? 1. _____ 2. _____ 3. _____ 4.