The similarities in red, green algae

(PhysOrg.com) -- For Debashish Bhattacharya, the knowledge that half the oxygen on Earth is generated by algae through photosynthesis begs an important evolutionary question: How did algae come to be such ndustrious carbon-dioxide-consuming, sugar-and-oxygen producing factories? Did each of the two major kinds of algae, red and green, evolve their photosynthetic abilities separately? Or did they have a common ancestor?

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