CRITICAL THINKING 3.Buffalo graze on the grasses
of the North American plains, while yaks graze on
grass in northern Asia. How do Darwin's catego-
ries of species variation apply to this comparison?

What happens when the cell copies its chromosomes

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms