Respuesta :
Basically, a DNA is made
up of sequences of nucleotide bases (these are the little strands attaching
each side of the DNA that you see in the model). These sequences define what
features you get, e.g. hair colour, eye colour, etc. But, these can also
mutate, forming a DIFFERENT sequence, this will then lead to a different hair
color, eye color, etc.
Slowly the species changes if the mutation is considered helpful or an adaptation. If it is unhelpful that animal dies