Old Master  (or  old master ) is a painter of skill who worked in Europe before about 1800, or a painting by such an artist. An  old master print  is an original print (for example an engraving or etching) made by an artist in the same period. Likewise an old master drawing .
Quick Answer. Dendrology is the study of trees and other woody plants, such as shrubs and woody vines. Dendrologists study every aspect of wooded plants to determine various characteristics of their structural systems. Continue Reading.
Ecology is the study of the relationships between living organisms, including humans, and their physical environment; it seeks to understand the vital connections between plants and animals and the world around them.cologists study these relationships among organisms and habitats of many different sizes, ranging from the study of microscopic bacteria growing in a fish tank, to the complex interactions between the thousands of plant, animal, and other communities found in a desert. Ecologists also study many kinds of environments.