Amother sprints across the yard to grab her small child before he enters the street. the mother is using what kind of fibers

B.

type II B fast-twitch muscle fibers that respond quickly and provide her with speed and strength

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:

voluntary muscles are controlled by the cerebellum.