I can grow in the harshest conditions, yet I am not a cactus. What am I?
Category: Knowledge · Difficulty: hard
Hint: I am a symbiotic organism often found on rocks.
Answer
Lichen
Explanation
Lichen can thrive in extreme environments and is a combination of fungi and algae.
This is a hard knowledge riddle — a tricky one that takes a little thought. The answer is Lichen.
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