May occur because of mistakes made when dna copies itself during cell divisions or because of environmental factors such as ultraviolet radiation from the sun.

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

What best describes the structure of the declaration of independence?

What advantages does a pedigree have over a written passage?