Final answer:
A group of cells grown in a nutrient solution from a single original cell is referred to as a colony. It doesn’t fit into the terms tissue, organ, or organism because these refer to structures within (or comprising of) multicellular organisms.
Step-by-step explanation:
When a group of cells are proliferated in a nutrient solution from a single original cell, it is referred to as a c) Colony. In the biological hierarchy of complexity, cells combine to form tissues, groups of similar cells serving the same function. Then tissues form organs, collections of tissues grouped together based on a common function. This is how a complex, multicellular organism is formed. However, each tree in a forest can be considered as an organism. And in terms of cell growth in labs, when a single original cell multiplies to form a group of cells, we refer to that group as a 'colony'.
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