Cloning has been going on in the natural world for thousands of years. A clone is just one living thing made from another, leading to two organisms with the same set of genes.
Plants that are self pollinated will produce seeds that will eventually grow into more plants with the same DNA or genetic code. Some forests are made entirely of trees spawning from one single plant. This happens because the original tree spread its roots, which later sprouted new trees. Although there are many cons of this sort of cloning because, if the species of trees get infected they all do.
An excellent example of cloning in nature is when an earthworm is cut in half, it'll be able to grow back the missing parts of their bodies, leading to two worms with the same set of genes. Lastly, not many people realize it but giving birth to twins is also categorized as cloning since they are born sharing their DNA.
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