What are four characteristics of the universal common ancestor

b is the best answer for this question.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.