Injuries or trauma to any part of the arm or shoulder, including bone fractures, joint dislocations, and muscle strains and sprains, are common causes of arm pain. Sometimes diseases that affect other organs in the body, like peripheral vascular disease or arthritis, can be the cause of pain in the arm.
/sporÂ·uÂ·laÂ·tion/ (sporâ³u-laÂ´shun) formation of spores. sporulation. 1 a type of reproduction that occurs in fungi, algae, and protozoa and involves the formation of spores by the spontaneous division of a cell into four or more daughter cells, each of which contains a part of the original nucleus.
The answer is simple: meiosis. You probably already know that, following an initial chromosomal duplication, meiosis. results in daughter cells with half the number of chromosomes as the parent cell. When yeast are under environmentally stressful conditions a form of meiosis takes place, known as sporulation. During sporulation, haploid spores are produced for each mating type and are contained in a tough membranous structure called an ascus, as indicated here with yellow circles.