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.
Introduction to plants produce spores: Sporogenesis or spore formation is a type of asexual reproduction. Only one parent is involved in asexual reproduction and produces offspring that are identical to the parent. Sexual reproduction involves of two individuals or gametes, one each from opposite type of sex.hey reproduce by the formation of spores. Ferns reproduce by an alternation of generations, the fern itself being the sporophyte, which produces asexual spores. In most ferns the spore-bearing sacs, sporangia are borne in clusters and called sori. They appear as brown dots or streaks on the lower side of the leaves.