A defining and extremely limiting trait of the Roman numeral system is that it lacks a character to designate the number 0. The system also has no way to represent negative or decimal numbers. This all goes back to the fact that Roman numerals were developed primarily to count and keep track of things for commerce. defining and extremely limiting trait of the Roman numeral system is that it lacks a character to designate the number 0. The system also has no way to represent negative or decimal numbers. This all goes back to the fact that Roman numerals were developed primarily to count and keep track of things for commerce.
Francisella tularensis is a common gram negative bacteria that is found throughout the United States, but is most commonly located in the central states (Missouri, Arkansas, Illinois, Oklahoma, Tennesee). This small microbe is the cause of a medical condition diagnosed as rabbit fever (Tularemia).
Lemongrass. Repels mosquitoes. Youâve no doubt seen citronella candles in stores during the summer and read how citronella will keep mosquitoes away. Citronella is a natural oil found in lemongrass, an ornamental that can grow up to 4 feet tall and 3 feet wide in one season.epels house flies and mosquitoes. Plant basil in containers by your house doors and in outdoor areas where you like to relax or entertain. Basil is delicious in salads, in many pork and chicken recipes and with a variety of soups. You also can use fresh basil to make an insect repellent spray.