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A research student collected certain algae both as and found that its cells contained both chlorophyll a and chlorophyll b as well as phycocerythrin. The alga belongs to:

1. Rhodophyceae
2. Bacillariophyceae
3. Chlorophyceae
4. Phaeophyceae

Correct answer: Rhodophyceae

Solution

Rhodophyceae (red algae) characteristically contain chlorophyll a and phycobilin pigments such as phycocerythrin. The presence of phycocerythrin rules out the green, brown, and diatom groups listed.

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