I believe it is C.) Tasting a solution you think is edible after creating it in the lab.
I could be wrong though.
<u>Human activity</u>. The sixth mass extinction of of organisms caused by human actions potentially could go as far back as the late Pleistocene era (over 12,000 years ago.)
Both it.) And I.) Can be answers. You could argue either one is right.
Answer:
is this it?
Explanation:
Cytotoxic CD8 T cells carry out their killing function by releasing two types of preformed cytotoxic protein: the granzymes, which seem able to induce apoptosis in any type of target cell, and the pore-forming protein perforin, which punches holes in the target-cell membrane through which the granzymes can enter.
