Genetic variation. C is the answer
The preliminaries utilized as a part of this lab are intended to section an arrangement inside the PV92 district that is 641 bp long if the intron does not contain the Alu addition or 941 bp long if Alu is available. The 300 bp increment is because of the grouping of the Alu embed.
Regardless, for the chemical equation to move accurately, energy/sunlight should be add on the top of the arrow.
Evolution, allowed birds to survive in various climates
