While Scuba Diving, You Recover Several Samples of a Red

Multiple Choice

While scuba diving, you recover several samples of a red alga that appear almost crimson in color.When you return to your lab and attempt to grow the alga in your saltwater fish tank, new growth of the alga appears bright green.What best explains this phenomenon?

A) The intensity of light has changed, affecting pigment composition.
B) The composition of the salt water has changed, affecting pigment composition.
C) The alga has engulfed a new cyanobacterial endosymbiont.
D) The alga is missing vital nutrients that allow for the accumulation of phycoerythrin.
E) The alga is stressed and is slowly dying.