Which plant tissue has air spaces in it? A: Palisade cells
B: Waxy cuticle
C: Upper epidermis
D: Spongy mesophyll

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