Which term means "surgical reconstruction of a vessel"?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans