A small membrane-bound sac for transporting various substance within the cell

Look at the picture below . what does this picture represent ?

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

The first amino acid of a new polypeptide chain is