A closed loop system is one where the ouput of the system is at least part of the input. In a refrigerator, the output of the cooling system (the cold air inside the refrigerator) is measured, and is fed back into the system to determine whether the system needs to continue cooling.
<span>An example of a fridge that was an open loop system would be one that turns on and cools for 1 hour every 6 hours, regardless of internal temperature.</span>
Answer:
No, this would not be a symbiotic relationship.
Explanation:
Symbiotic relationship is between plants and fungi.
I think that it would be a toss up between sight and touch. For example, for sight they dont really rely on that one a ton due to the fact that many fish use there hearing and smell to find things, and touch because they are in water after all all the times and when they get food they dont go around feeling things for other fish/food.