Question

In 2005, a large algal bloom composed of _____ caused a toxic condition known as the "red tide" which closed shellfish harvesting off of Newfoundland, Maine, and Massachusetts.

a. cyanobacteria
b. diatoms
c. dinoflagellates
d. red algae

Answer 1

c. dinoflagellates are known to be mixotrophic plankton, which combines photosythensis and phagotrophy, or the ingestion of their prey.