Spore

Spore explained in an easy to understand way:

Imagine you have a single key that can open an entire house filled with different rooms, each with unique purposes and functions. Just like this key, a spore is a tiny, seemingly simple structure that has the potential to grow into an entire new plant with all its complex parts. The connection here is that both the key and the spore hold the power to unlock and initiate a much larger, more complex system from a singular, compact form.