The Chloroplasts of Red Algae Have a Characteristic Color Because

Multiple Choice

The chloroplasts of red algae have a characteristic color because the red algae

A) obtained their chloroplast by secondary endosymbiosis.
B) retain certain pigments from the original prokaryote symbiont lost in green algae and plants.
C) acquired red pigments from a red tide.
D) have a peptidoglycan-containing cell wall.
E) have a thick cell wall that refracts the chlorophyll color.