| A | B |
|---|
| Aristotle | This person was the first to practice scientific zoology. He is known to have performed extensive studies of marine life and plants. |
| Leonardo da Vinci | This person risked censure by participating in human dissection and making detailed anatomical drawings that are still considered among the most beautiful ever made. |
| Carolus Linnaeus | Binomial classification was developed by this person in 1735 by using Latin names to group species according to their characteristics. |
| Robert Hooke | This person used a simple compound microscope to examine a thin sliver of cork. He observed that the plant tissue consisted of rectangular units that reminded him of the tiny rooms used by monks. He called these units "cells." |
| Anton von Leeuwenhoek | In 1667 this person published the first drawings of living single celled organisms. |
| Theodore Schwann | This person added the information that animal tissue is also composed of cells in 1839. |
| Gregor Mendel | This person is known as the father of genetics although is papers on inheritance, published in 1866, went largely unnoticed at the time. His work was rediscovered in 1900 and further understanding of inheritance rapidly followed. |
| Charles Darwin | This person published "On the Origin of Species," the text that forever changed the world by showing that all living things are interrelated and that species are not separately created but arise from ancestral forms that are changed and shaped by adaptation to their environment. |
| Watson and Crick | Explained the structure and function of DNA in 1953. |
