Fossil fuel dependence has an impact on which of the following? A)
the environment
B)
economics
C)
poverty
D)
international security
E)
all of the above

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