| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | biogenetic law | 19th-century Biology | The biogenetic law proposed by Ernst Haeckel in 19th-century biology suggested that the embryonic development of an organism reflects its evolutionary history. | 1 |
| 2 | spontaneous generation | 19th-century Biology | During the 19th century, spontaneous generation was a widely accepted theory in biology, asserting that living organisms could arise from non-living matter. | 1 |