Besides cardiac muscle, what other tissue type possesses pacemaker cells?

Smooth muscle is another type of tissue that possesses pacemaker cells beside the cardiac mucle. It has a pacemaker activity that can remove the vibration of waves without the present of some external stimuli. In addition, smooth muscle can also start a spontaneous contraction. 

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:

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.