Which of the following is a building block of proteins and contains an “R” group? a. Nucleic acid B. Glycogen C. Amino acid D. Glycerol

How does human environment effect the biosphere

I’m stuck on this question cuz i’m stupid sksksksk

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen