Which component makes each amino acid unique? amino group carboxyl group R group phosphate group

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

The influenza virus cause the flu, but not other diseases. why?

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.