Explain the importance of promiscuous binding specificity exhibited by mhc class i and class ii molecules.

It allows cells and antigen presenting cells to present a large range of antigens (in the range if millions) to T cells so there is an appropriate immune response against the invading pathogen or cancer.  This is possible without changing or having many types of MHC complexes.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a