It's easy to imagine how particularly those parts of our bodies were quickly influenced by selection from the environment and shifted frequencies of genes that are involved in them.
Ir viegli iedomāties, cik sīki šīs ķermeņa daļas tika ātri ietekmētas, vides un izmainītu gēnu frekvences izvēlētas, kas tajās ir iesaistītas.