Which is a point mutation? frameshift insertion deletion missense

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

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what