What are the three ways there can be a base change in a sequence?

substitutions, deletions and insertions

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.