Aristotle: Father of Biology
Hippocrates: Father of Human Medicine
Publius Flavius Vegetius Renatus: Father of Veterinary Medicine
Charles Darwin: Father of Evolution
Carolus von Linnaeus: Father of Taxonomy or Systematic Classification of Organisms
Johann Gregor Mendel: Father of Genetics
Galen/Galenus of Pergamon: Father of Human Anatomy
Andreas Vesalus: Father of Comparative Anatomy
Louis Pasteur: Father of Foundations of Microbiology
Robert Koch: Father of Modern Microbiology
Rudolf Leuckart: Father of Parasitology
Anton van Leeuwenhoek: Father of Protozoology
William Harvey: Father of Blood Circulation & Physiology; discovered the process of blood circulation
Rudolf Virchow: Father of Modern Pathology
Paracelsus: Grandfather of Pharmacology
Robert Hooke: 1st to observe the cell under the microscope from corks in 1665
Matthias Schleiden: botanist
Theodore Schwann: zoologist
Watson & Crick: discovered the double helical strand of the DNA structure in 1953
Hans (father) & Zacharias (son) Janssen of Holland: invented the 1st microscope, but credit was given to Leeuwenhoek by observing the biological specimens (RBC, protozoan, bacteria, sperm cell)