Species - One of the most basic units of biological classification, ranking just below the genus and comprising individuals or populations capable of interbreeding.⏎
Transition Zone - The area, sometimes referred to as an ecotone, encompassing the edges of two distinct ecosystems, such as the area where a forest intersects with grassland.⏎
Skin Lesion - Any abnormal tissue on the skin caused by injury or disease.⏎
Symptom - A subjective indication of the presence of disease or a departure from the body’s normal state of functioning.⏎