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.
Vascular bundle scars are very numerous and joined in a line; buds are broadly rounded; twigs are fairly stout Fraxinus Ashsee 2a-c below 2a. Terminal bud cone-shaped; first pair of lateral buds below the terminal bud are slightly below it on the branch; leaf scar is nearly oval Fraxinus nigra black ash 2b.