Used by plants as ammonia
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<span>These are viroids. They are some of the smallest types of matter that have been shown to take on the properties of living beings. They have the ability to replicate, while not having many of the mechanisms that are commonly found in DNA and required for them to replicate.</span>
The first one, Added removed or changed. Mutation as in anything that would cause the slightest change.
The answer is Actin, tubulin, Titin
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