A botanist discovers an algal species that has chlorophyll a, chlorophyll d, and phycoerythrin. Its primary storage product is floridean starch, and its cell wall contains phycocolloids like carrageenan. Which of the following statements about this alga is most likely correct?
Correct: C
The combination of pigments chlorophyll a, chlorophyll d, and phycoerythrin, along with floridean starch as the primary storage product and cell wall components like carrageenan, are characteristic features of Rhodophyceae, or red algae. Phycoerythrin, a red pigment, allows red algae to absorb blue-green light that penetrates deeper water, enabling them to thrive in significant depths where other algae cannot. Chlorophyceae (green algae) have chlorophyll a and b, and store starch. Phaeophyceae (brown algae) have chlorophyll a, c, and fucoxanthin, storing mannitol and laminarin. Cyanophyceae (blue-green algae) are prokaryotic and belong to Kingdom Monera, not typically classified with eukaryotic algae in this context.