What are mushrooms? - Are mushrooms a kind of plant?
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What are Mushrooms?

Mushrooms
Mushrooms

About 600 million years ago, a few eukaryote cells developed into multi-celled creatures. Some of them became animals, and some became plants, and others became mushrooms and the other funguses like yeast. So mushrooms are not either animals or plants, though they are more closely related to animals than they are to plants.

There are many different kinds of mushrooms, but most mushrooms grow in more or less the same way. Most of the cells of the fungus actually stay underground, where they form a long, wide net of cells something like plant roots (they look like black shoelaces). These underground nets of cells can live a long time, even thousands of years.

Like other eukaryote creatures, mushrooms use mitosis to grow bigger, and meiosis to produce tiny one-celled spores. The wind blows these spores away from the mother plant so that new mushrooms can grow in new soil.

Most of the spores land on rocks or in water and don't manage to grow at all. But when a spore lands on dirt or a decaying plant, it begans to eat the molecules in the dirt or the wood and sends a network of cells down into the ground. The network of cells is only a few cells thick, so it doesn't need a circulatory system or a digestive system. When the network gets big enough, it sends up more mushrooms out of the ground, and these mushrooms produce spores, and the spores blow away to make new mushroom colonies.

Some funguses have evolved to develop partnerships with ferns, which evolved only a little later, so that each of them depends on the other to stay alive.

To keep from being eaten by animals or plants, many kinds of mushrooms have developed poisons so that nothing will want to eat them. It's hard to tell which mushrooms are poisonous, so you shouldn't eat any wild mushroom unless your parents say it is okay.

Bibliography and further reading:

Plants
Animals
Biology
Chemistry
Math
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Karen Carr is Associate Professor Emerita, Department of History, Portland State University. She holds a doctorate in Classical Art and Archaeology from the University of Michigan. Follow her on Instagram or Twitter.
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