1. | Both Hugo de Vries and Darwin believed that it was mutation that caused evolution. |
2. | Both Hugo de Vries and Darwin believed that it was minor variations that caused evolution, not mutation. |
3. | Mutations are small and directional, while Darwinian variations are random and directionless. |
4. | Evolution for Darwin was gradual while de Vries believed mutation caused speciation and hence called it saltation (single-step large mutation). |
1. | discontinuous variations due to mutations are important for evolution |
2. | continuous variations due to recombination are important for evolution |
3. | evolution is a function of time |
4. | evolution is a deterministic process |