The pigment in blue-green algae is _____ which is the same as the one found in green plants. These blue-green algae are _______.
- APhycocyanin, Photoautotrophs
- BHeterocysts, Nitrogen fixers
- CAll pigments except chlorophyll a, Photoautotrophs
- DChlorophyll a, photoautotrophs
✓ Correct answer: D
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