â¦longevity of seeds, the dormant embryo plant contained within the seed will lose its viability (ability to grow) if germination fails to occur within a certain time. Reports of the sprouting of wheat taken from Egyptian tombs are unfounded, but some seeds do retain their viability a long time.
Implantation bleeding-Spotting during pregnancy may be caused by implantation. Implantation bleeding occurs after the egg burrows into the lining of the uterus. As the egg implants into the lining sometimes a little bit of bleeding will occur.
1. Common Causes. 1  Light spotting may occur when you ovulate or release an egg from your ovary. 2  Spotting may occur during implantation (implantation bleeding), which occurs when a fertilized egg attaches to the inner wall of the uterus. In this case, 'spotting but no period' becomes an early sign of pregnancy.