Instead they focused on topics like physiology, and genetics that could be easily investigated with controlled experiments in the laboratory, and discounted natural selection and the degree to which organisms were adapted to their environment, which could not easily be tested experimentally.
Ao contrario, eles centrábanse en temas como a fisioloxía e xenética que podían ser facilmente investigadas con experimentos controlados no laboratorio, e menosprezaban a selección natural e o grao ao cal os organismos se adaptaban ao seu ambiente, que non podía ser comprobado doadamente de maneira experimental.