A class of green algae with well-developed chlorophyll and photosynthetic ability, representing 'true' green algae.
From Greek 'eu-' (well, good) + 'chloro-' (green) + 'phyce-' (algae). This taxonomic name literally means 'well-green algae,' distinguishing them from poorly-pigmented cousins.
These algae are like nature's solar panels—they're so good at photosynthesis that they produce nearly 70% of Earth's oxygen while being invisible to the naked eye!
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