The Test. Tests for Epstein-Barr virus (EBV) antibodies are used to help diagnose infectious mononucleosis (mono) if a person is symptomatic but has a negative mono test.he Test. Tests for Epstein-Barr virus (EBV) antibodies are used to help diagnose infectious mononucleosis (mono) if a person is symptomatic but has a negative mono test.
leaf scar. (botany). A mark on a stem, formed by secretion of suberin and a gumlike substance, showing where a leaf has abscised. 1  Facebook. 2  Twitter.
glossary of plant terms. Click on an image for a larger view. bundle scar-markings within a leaf scar at the location where vascular bundles were broken as the leaf petiole detached from the twig. (also known as bundle traces). three bundle scars in a Nyssa sylvatica (black gum) leaf scar hires.