Vitamin B3 is a precursor for NAD+. Back in the early 1900's those living in orphanages and prisons were fed a corn-heavy diet. Absent the process of nixtamalization, vitamin B3 is poorly released from corn and individuals on this diet develop a condition called pellagra. Which of the following metabolic steps would be directly affected in those individuals with pellagra?

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales