The study of which structure was instrumental in the formulation of the modern cell theory?
a. plant cell
b. animal cell
c. cell membrane
d. dna molecule

Which of the following are not matched correctly? cd8+: directly destroy infected or cancerous cells t reg cell: reduce the adaptive response once threat passes t l: activate cellular branch (cytotoxic t cells, macrophages, nk cells) t 2: stimulate b cells to make antibodies t (cd4+): mhc i