Understanding Variation and Evolution: Factors and Processes Explained

The video tutorial explores the factors causing variation in populations, focusing on genetic and environmental influences. Genetic variation arises from inherited genes and mutations, while environmental variation results from conditions affecting development. The interaction of genes and environment can influence traits like height. The video also covers Darwin's theory of evolution, explaining how natural selection leads to changes in populations over time, potentially resulting in new species.

Describe the process of natural selection and its significance in evolution.

How can two populations of the same species become so different that they can no longer interbreed?