Final answer:
The term for attaching structures end to end is called linear structures, commonly applied to biological polymers comprising monomer units linked in a chain.
Step-by-step explanation:
The term for attaching structures end to end is called linear structures. In the context of Biology, this concept can often be applied to structures like polymers, where smaller units, known as monomers, are linked in a chain. For example, proteins are linear chains of amino acids that fold into complex shapes necessary for their function.