The merit of a new scientific theory is judged by the scientific community based on. how well-known the theory is within the general public.. the popularity of the theory within the general public.. how well existing scientific data are explained by the new theory.. the popularity of the scientist who proposes the theory..

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.