Soil. The soil of the temperate grasslands is deep and dark, with fertile upper layers. It is nutrient-rich from the growth and decay of deep, many-branched grass roots. The rotted roots hold the soil together and provide a food source for living plants. Each different species of grass grows best in a particular grassland environment (determined by temperature, rainfall, and soil conditions). The seasonal drought, occasional fires, and grazing by large mammals all prevent woody shrubs and trees from invading and becoming established.
Dicloxacillin is penicillin-like antibiotic, prescribed for certain types of bacterial infections such as pneumonia, infections of the ear, urinary tract, bone and skin.
Why are we interested in this question? For primarily historical reasons, it was believed that Mycoplasma pneumoniae was a common causative agent of bullous myringitis, leading to the recommendation that macrolides and fluoroquinolones be used to treat bullous myringitis in pediatric and adult patients, respectively.