Shells are good or bad does it have bacteria's

Many shells have bacteria they are in the ocean with fish fesses aka poop

Explanation:

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:

answer; /// i believe the correct answer is (thrombocytopenia); (a)