Anew and effective antibiotic becomes widely used for a particular species of bacteria. after some time, an antibiotic-resistant strain of the bacteria becomes prevalent. which mechanism explains this phenomenon?

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

What is the correct term for living the most sustainable life you can within your current circumstances?