So, as you all know, species lived in particular ecological niches and particular environments, and the pressures of those environments selected which changes, through random mutation in species, were going to be preserved.
Seperti yang Anda ketahui, spesies hidup dalam ceruk ekologi dan lingkungan tertentu, dan tekanan dari lingkungan itu memilih perubahan apa, melalui mutasi acak di dalam spesies yang akan dipertahankan.