A small gourd full of blood type of genre is this

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

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.