These short grasses can have roots that extend 1 m (about 3 ft) deep. The height of grass correlates with the amount of rainfall it receives. Grasslands receive about 500 to 900 mm of rain per year compared to deserts, which receive less than 300 mm and tropical forests, which receive more than 2,000 mm. While temperatures are often extreme in some grasslands, the average temperatures are about -20Â°C to 30Â°C.
The use of antimicrobials has been linked to the rise of resistance in every drug and species where it has been studied, including humans and livestock. However, the role of antibiotic use in food animals â in contrast to the use of antibiotics in humans â in the rise of resistant infections in humans is in dispute.
Penicillin was the first antibiotic made available to humans during World War II. It was very effective against gram-positive bacteria, but didnât last long and was susceptible to stomach acid so was wasted inside the body. Amoxicillin is the new and improved version of penicillin that is able to last longer, resist stomach acid, and kill both gram-positive and gram-negative bacteria. It is often used to prevent and treat infections found in cuts and wounds, the mouth, the upper respiratory system, and the bladder. Amoxicillin also has better absorption than another predecessor, Ampicillin.