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.
spores are also known as endospores. Endospores are produced by Gram-positive bacteria from the Firmicute phylum that forms when a bacterium produces a thick internal wall tha â¦ t encloses its DNA and part of its cytoplasm. Examples include, but are not limited to, Bacillus and Clostridium.7 people found this useful.ndospores are produced by Gram-positive bacteria from the Firmicute phylum that forms when a bacterium produces a thick internal wall tha â¦ t encloses its DNA and part of its cytoplasm.