Ecologists study the relationship between organisms and their environments. Medical microbiologists study the relationship between organisms and diseases. Microbiologists investigate the growth and characteristics of microscopic organisms. Bacteria, algae, or fungi are examples of such organisms. Physiologists study the life functions of plants and animals.
Zoologists study the origins, behavior, diseases, and life processes if animals.
Biotechnology is an area of biology that is growing rapidly. Some biologists, for example, make changes to the genetic material of plants or animals. These changes are then used in the fields of medicine, pharmacy, agriculture, foods, and chemicals. Some biologists hold faculty positions at universities or colleges. They teach or do research, and often do both.