Some Dinoflagellates Live Endosymbiotically with Corals

Multiple Choice

Some dinoflagellates live endosymbiotically with corals.When they die or are expelled by the corals-a phenomenon called "coral bleaching"- the corals can be damaged or destroyed because the dinoflagellates

A) protect corals against parasites.
B) bring microorganisms past feeding coral with the current created by their flagella.
C) contribute to coral nutrition through photosynthesis.
D) create phosphorescence that attracts prey microorganisms to corals.
E) release toxins that immobilize microorganisms on which corals feed.