ICSE Class 10: Theories of Evolution Videos | Heredity and Evolution

Darwin’s theory is based on natural selection, while Lamarck’s theory is based on inheritance of acquired traits.

The Y chromosome is found only in men. 

Since beetles of one sub-population were dropped by a crow into beetles of another sub-population, there will be gene flow between the two sub-populations. The migrant population will reproduce with the local population, and hence, no new species will be formed.