Dinoflagellates
A) Usually appear at the very beginning of the spring
B) Need silica and only occur near coasts with silica rich rocks
C) Usually do not appear in a phytoplankton bloom until other phytoplankton species become abundance in the later winter-spring
D) Only reproduce sexually

Question

Quizplus · Accepted Answer

Dinoflagellates typically do not appear in significant numbers in a phytoplankton bloom until after other species have already become abundant in the later winter or spring. They are known for their role in "red tides" and can be a major component of phytoplankton blooms, but they are not the initial colonizers.