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.
Introduction to different types of spores: Definition of spores: Spore is a single celled reproductive body that grows into a new organism. it is produced by bacteria,fungi,seedless plants and some protozoanâs.Flowerless plants such as ferns and mosses also produce spores.Single spores develop into new organisms.ungi: Most fungi develop spores. They produce diploid spores, in organs known as sporangia. Fungal spores are light and are carried away by wind and water to a greater distance. Liverworts and mosses also produce diploid spores.