Back Категория:Правила в биологията Bulgarian Kategorio:Biologiaj reguloj Esperanto Kategooria:Bioloogilised reeglid Estonian رده:قانونهای زیستشناختی Persian Kategori:Biyolojik kurallar Turkish Turkum:Biologik qoidalar Uzbek Category:生物学法则 Chinese
Biological rules describe patterns of variation within and across species most often in regard to size. While they are described as rules there are often many exceptions to them.