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.
Asexual Spores. The fungi form a wide range of different types of spores. Very different types of spores are formed following asexual or sexual processes. LINK Where the spore is genetically similar to its parent, and is formed following a vegetative division, it can be called an asexual spore.n contrast to seeds, spores have no specialised components that differentiate them from other cells of the thallus. Thus any viable cell may be called a spore, when upon separation from the thallus it can form a new individual.