Is the dna in all our cells the same ? Is ALL our dna "turned on" in every cell?

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.

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

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