1 If the black lines aren't visible on the external screen, the laptop screen may need to be replaced. 2  If the black lines are also visible on the external screen, the video card or motherboard may need to be replaced. 3  In some cases, a loose video card can cause problems with the monitor video.
1. segmentation - (embryology) the repeated division of a fertilised ovum. cleavage. embryology-the branch of biology that studies the formation and early development of living organisms. cell division, cellular division-the process in reproduction and growth by which a cell divides to form daughter cells.
Segmentation Genes. It's true that your body shape has a lot to do with what you eat and how you exercise, but we all know that a lot of what you look like also comes from what is in your genes.hey control development in this order. These segmentation genes control the development of segments, or small repeated regions of a body that make up specific structures. If you were to look at a fly embryo during development, you'd quickly notice these segments along their bodies.