What elemental compound comprises up to 95 of the mass of a diatom's cell wall?
a. silica (SiO2)
b. calcium carbonate
c. magnesium carbonate
d. calcium sulfate
e. sodium bicarbonate
Question 2Which plankton group operates at one of the most efficient energy conversion rates known?
a. coccolithophores
b. dinoflagellates
c. cyanobacteria
d. diatoms
e. zooplankton