🌿 Algae — Earth's Oldest Autotrophs |#Algae #Biology #Botany #Photosynthesis #BiologyFacts #NCERT

**🌿 Algae — Earth's Oldest Autotrophs |

Did you know algae have been producing oxygen for billions of years? 🌊

These simple, chlorophyll-bearing organisms are found everywhere — from freshwater lakes and salty oceans to moist stones, damp soil, and wet wood. They don't have roots, stems, or leaves — just a thallus — yet they power life on Earth.

And their partnerships? Mind-blowing. 🍄
Algae team up with fungi to form **lichens**, colonising bare rock. They even grow on the fur of **sloth bears** — one of nature's most unexpected associations.

💚 ~50% of the world's oxygen comes from algae. Small organisms. Enormous impact.

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**📌 Topics covered:**
✅ What are algae?
✅ Autotrophic & thalloid nature
✅ Aquatic & terrestrial habitats
✅ Algae + Fungi = Lichens
✅ Algae on animals (sloth bear)

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