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. As the lab manual explains, segmentation is the characteristic that the body is divided into repetitive segments arranged on a longitudinal axis. Each segment contains parts of the circulatory, digestive, nervous, and excretory systems.Annelids are among the earliest organisms to appear with a segmented body plan.Other organisms also have a segmented body plan. Arthropods, such as insects, show a strong degree of segmentation with a head thorax and abdomen with specific functions.Echinoderms, such as starfish, are also segmented, but their segmentation is not along a longitudinal axis because of their radial symmetry.ther organisms also have a segmented body plan. Arthropods, such as insects, show a strong degree of segmentation with a head thorax and abdomen with specific functions. Echinoderms, such as starfish, are also segmented, but their segmentation is not along a longitudinal axis because of their radial symmetry.