The correct option is A.
The DNA from one specie differ from the DNA of another specie on the basis of their base ratio. The base ratio refers to the percentage of purine to pyrimidine in a DNA molecule. The base ratio is the one that is responsible for the variability that is observed in chromosomes from different species.
Could you say the sun rises in the east ? I’m not too sure though
I also need help with this
The place where these molecules fit is called the active site .
Not sure what the choices are but a biotic factor is anything living.
