HELP ME Explain how physical variation is expressed in human beings and how it relates to cultural groups and ethnicity?!??

What would happen if the krill were removed from the food web

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species