1) If you have a Sedgwick rafter counting chamber (20 x 50 x 1 mm) and your width of optical field was 0.5 mm and you counted 100 cells in one transect, what is the cell concentration per ml? a) 400 b) 40 c) 4000 d) 40,000 2)What is a polyna? a) Coccolithophore flagellar base b) cyanobacterial storage product c) atmospheric depression from El Nino d) ice free area in polar regions e) none of the above.