I’m really confused about this one. Let’s say I kind of understand the way fungi develop eg. on food – it rots over time and the fungus has like the ‘basis’ to grow on. But on walls? I know they need high humidity and temperature to develop but in the end humidity is just water vapour in the air, so all that’s left is a piece of wall and water, I don’t get where the fungus comes from.
In: Biology
Fungi are a whole kingdom of species, like animals and plants. They reproduce via spores. So if you’re asking how it initially appears on the wall, a spore gets blown onto your wall and it starts to grow.
For their food source, fungi are almost horror movie level good at processing almost anything you can think of. The typical household mold mostly feeds on cellulose, but there are many many types that will happily survive on just about anything organic.
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