In medicine, the BUN-to-creatinine ratio is the ratio of two serum laboratory values, the blood urea nitrogen (BUN) (mg/dL) and serum creatinine (mg/dL) (Cr).he normal range of urea nitrogen in blood or serum is 5 to 20 mg/dl, or 1.8 to 7.1 mmol urea per liter. The range is wide because of normal variations due to protein intake, endogenous protein catabolism, state of hydration, hepatic urea synthesis, and renal urea excretion.
The two most common types of asexual reproductive spores produced by molds are conidiospores and sporangiospores. Conidiospores are borne externally in chains on an aerial hypha called a conidiophore (see Fig.he two most common types of asexual reproductive spores produced by molds are conidiospores and sporangiospores. Conidiospores are borne externally in chains on an aerial hypha called a conidiophore (see Fig.
â¢During asexual reproduction, haploid spores are. produced in structures called sporangia that form at the tips of specialized hyphae. â¢The haploid spores are produced by mitosis. â¢Spores are carried by wind to new locations, where they grow into new fungi.ac Fungi Key Idea: Sac fungi are characterized by an ascus, a saclike sexual reproductive structure that produces spores. â¢An ascus is a âsac.â. Sac Fungi â¢Sexual reproduction in sac fungi is similar to sexual reproduction in zygote fungi. â¢Hyphae of two mating types fuse.