It's a problem - a problem originates when a question is asked. In this case, we have come up with a problem that needs a solution:
1. - We'll experiment in order to come up with a hypothesis (a not-valid-yet answer of what the solution to our problem is).
2. - After a series of experiments that either prove or prove our hypothesis wrong, we'll be able to come up with a theory (a valid but still discussable final hypothesis of what the solution to our problem is).
The organism that you described is most likely a star fish. All its limbs go from the middle and if one is damaged or removed, a new one will grow from the center to replace it.
