the fact that for a given species the amount of purnies in hte dna always matches the number of pyrimidines was first determined by

It was given by Chargaff and it is know as chargaff's rule

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